<!-- Thanks for reporting issues back to us! To make it possible for us to help you please fill out below information carefully. --> ### Steps to reproduce 1.Upgrade to NextCloud 26.0.0 ### Expected behaviour ocsms should work ### Actual behaviour it's impossible to even activate ocsms ### Server configuration **Nextcloud/ownCloud version:** 26.0.0 **PHP version:** 8.1.13 **HTTPd server:** apache **Database engine & version:** MariaDB 10.6.11 ### Logs ``` Exception: Class "OCP\AppFramework\Db\Mapper" not found in file '/path/to/nextcloud/apps/ocsms/db/conversationstatemapper.php' line 21 ```