InvalidPlugin

[theinfamousj]

Bug description

calibre, version 7.6.0
ERROR: Unhandled exception: InvalidPlugin:Initialization of plugin Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/theinfamousj/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in <module>
from oscrypto import keys
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in <module>
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in <module>
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in <module>
from .util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in <module>
from ._openssl.util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in <module>
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 24, in <module>
from ._libcrypto_ctypes import (
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_ctypes.py", line 47, in <module>
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto
failed with traceback:
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/theinfamousj/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in <module>
from oscrypto import keys
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in <module>
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in <module>
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in <module>
from .util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in <module>
from ._openssl.util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in <module>
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 24, in <module>
from ._libcrypto_ctypes import (
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_ctypes.py", line 47, in <module>
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto

calibre 7.6 embedded-python: False
Linux-6.8.0-100-generic-x86_64-with-glibc2.39 Linux ('64bit', 'ELF')
('Linux', '6.8.0-100-generic', '#100-Ubuntu SMP PREEMPT_DYNAMIC Tue Jan 13 16:40:06 UTC 2026')
Python 3.12.3
Interface language: None
EXE path: /usr/bin/python3.12
Successfully initialized third party plugins: DeDRM (10, 0, 3)
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/theinfamousj/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in
from oscrypto import keys
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in
from .util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in
from ._openssl.util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 24, in
from ._libcrypto_ctypes import (
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_ctypes.py", line 47, in
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/preferences/plugins.py", line 325, in add_plugin
plugin = add_plugin(path)
^^^^^^^^^^^^^^^^
File "/usr/lib/calibre/calibre/customize/ui.py", line 520, in add_plugin
plugin = initialize_plugin(plugin, path_to_zip_file, PluginInstallationType.EXTERNAL)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/calibre/calibre/customize/ui.py", line 715, in initialize_plugin
raise InvalidPlugin((_('Initialization of plugin %s failed with traceback:')
calibre.customize.InvalidPlugin: Initialization of plugin Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/theinfamousj/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in
from oscrypto import keys
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in
from .util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in
from ._openssl.util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 24, in
from ._libcrypto_ctypes import (
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_ctypes.py", line 47, in
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto
failed with traceback:
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/theinfamousj/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in
from oscrypto import keys
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in
from .util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in
from ._openssl.util import rand_bytes
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 24, in
from ._libcrypto_ctypes import (
File "/home/theinfamousj/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_ctypes.py", line 47, in
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto

Operating system

Linux

Which version of Calibre are you running?

7.6.0

Which version of the ACSM Input plugin are you running?

v0.0.16

Import type

No response

Further information

I'm using Calibre (latest install) on Ubuntu Linux and tried to install the latest version of this plugin only to receive the following error message every single time. I'm knowledgable enough to follow instructions but not to understand why instructions are given, so I'm lost. What do I need to do to correct this?

[macolo]

macOS + Calibre 9 fix: rename Homebrew OpenSSL symlinks before installing and using the plugin

On macOS with Homebrew installed, the plugin fails to initialize because oscrypto finds and tries to load Homebrew's libcrypto.dylib, which macOS refuses to load into a signed process (Calibre) due to a Team ID mismatch.

The fix is to temporarily hide the Homebrew OpenSSL symlinks before installing the plugin, then restore them after you've imported your book:

sudo mv /usr/local/lib/libcrypto.dylib /usr/local/lib/libcrypto.dylib.bak
sudo mv /usr/local/lib/libssl.dylib /usr/local/lib/libssl.dylib.bak

Restore:

sudo mv /usr/local/lib/libcrypto.dylib.bak /usr/local/lib/libcrypto.dylib
sudo mv /usr/local/lib/libssl.dylib.bak /usr/local/lib/libssl.dylib

With the symlinks removed, oscrypto falls back to Apple's native Security/CommonCrypto frameworks, which are trusted by macOS and load cleanly into Calibre's process.

Tested on: macOS (Intel), Calibre 9.4.0, Homebrew openssl@3 3.6.1, DeACSM v0.0.16

[macolo]

macOS + Homebrew: Plugin fails to initialize due to uncaught OSError in oscrypto

Bug

On macOS with Homebrew's openssl@3 installed, the plugin fails to initialize with:

OSError: dlopen(/usr/local/lib/libcrypto.dylib, 0x0006): ...
not valid for use in process: mapping process and mapped file (non-platform)
have different Team IDs

Homebrew places a symlink at /usr/local/lib/libcrypto.dylib that oscrypto auto-discovers. macOS finds it but refuses to load it into Calibre's signed process because Homebrew binaries carry a different Team ID.

Root cause

In modules/oscrypto/oscrypto/_mac/util.py, the try/except block around the OpenSSL import is designed to fall back to a pure Python implementation if OpenSSL is unavailable — but it only catches LibraryNotFoundError:

try:
    from .._openssl._libcrypto import libcrypto
    ...
except (LibraryNotFoundError):
    from .._pkcs12 import pkcs12_kdf

LibraryNotFoundError is raised when the library is absent. When macOS finds it but blocks it due to a Team ID mismatch, it raises OSError instead — which escapes the except clause and crashes the plugin.

Fix

except (LibraryNotFoundError, OSError):
    from .._pkcs12 import pkcs12_kdf

One-line change. The pure Python fallback is already present and functional.

[macolo]

Locally, you can fix this by patching your ~/Library/Preferences/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_mac/util.py as per above (after plugin installing failure)

[umern]

I am also seeing the error on Mint Linux - trying to install DeACSM_0.0.16.zip
Sorry but I dont understand how the above MacOS fix would be applied to a linux install?
Thanks

[bjmc]

@theinfamousj I was getting the same error on Ubuntu 24.04

calibre, version 7.6.0 ERROR: Unhandled exception: InvalidPlugin:Initialization of plugin Traceback (most recent call last): File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin

calibre, version 7.6.0
ERROR: Unhandled exception: InvalidPlugin:Initialization of plugin Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/bjmc/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in <module>
from oscrypto import keys
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in <module>
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in <module>
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in <module>
from .util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in <module>
from ._openssl.util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in <module>
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 18, in <module>
from ._libcrypto_cffi import (
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_cffi.py", line 44, in <module>
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto
failed with traceback:
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/bjmc/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in <module>
from oscrypto import keys
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in <module>
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in <module>
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in <module>
from .util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in <module>
from ._openssl.util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in <module>
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 18, in <module>
from ._libcrypto_cffi import (
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_cffi.py", line 44, in <module>
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto

calibre 7.6 embedded-python: False
Linux-6.17.0-35-generic-x86_64-with-glibc2.39 Linux ('64bit', 'ELF')
('Linux', '6.17.0-35-generic', '#35~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue May 26 19:30:42 UTC 2')
Python 3.12.3
Interface language: None
EXE path: /usr/bin/python3.12
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/bjmc/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in
from oscrypto import keys
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in
from .util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in
from ._openssl.util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 18, in
from ._libcrypto_cffi import (
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_cffi.py", line 44, in
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/preferences/plugins.py", line 325, in add_plugin
plugin = add_plugin(path)
^^^^^^^^^^^^^^^^
File "/usr/lib/calibre/calibre/customize/ui.py", line 520, in add_plugin
plugin = initialize_plugin(plugin, path_to_zip_file, PluginInstallationType.EXTERNAL)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/calibre/calibre/customize/ui.py", line 715, in initialize_plugin
raise InvalidPlugin((_('Initialization of plugin %s failed with traceback:')
calibre.customize.InvalidPlugin: Initialization of plugin Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/bjmc/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in
from oscrypto import keys
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in
from .util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in
from ._openssl.util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 18, in
from ._libcrypto_cffi import (
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_cffi.py", line 44, in
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto
failed with traceback:
Traceback (most recent call last):
File "/usr/lib/calibre/calibre/customize/ui.py", line 710, in initialize_plugin
p.initialize()
File "calibre_plugins.deacsm.init", line 226, in initialize
from libadobe import createDeviceKeyFile, update_account_path, sendHTTPRequest
File "/home/bjmc/Downloads/DeACSM_0.0.16.zip/libadobe.py", line 59, in
from oscrypto import keys
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/keys.py", line 5, in
from ._asymmetric import parse_certificate, parse_private, parse_public
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_asymmetric.py", line 27, in
from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/kdf.py", line 9, in
from .util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/util.py", line 14, in
from ._openssl.util import rand_bytes
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/util.py", line 6, in
from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto.py", line 18, in
from ._libcrypto_cffi import (
File "/home/bjmc/.config/calibre/plugins/DeACSM/modules/oscrypto/oscrypto/_openssl/_libcrypto_cffi.py", line 44, in
raise LibraryNotFoundError('Error detecting the version of libcrypto')
oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto

I was able to resolve it by

• rm -rf ~/.config/calibre/plugins/DeACSM/ to remove the old/broken version of the plugin
• Close and re-open Calibre to refresh the plugin cache
• Git clone this repository.
• ./bundle_calibre_plugin.sh to build a new calibre-plugin.zip
• "Load plugin from file" and install the plugin.

@Leseratte10 it would be great if we could have a new release of the latest compatible version - the last official release is 0.0.16 from 2022. Please let us know if you need help with testing. Thanks for your work on this plugin!