Looks like this integration ran into the dreaded:
Detected integration that called async_setup_platforms instead of awaiting async_forward_entry_setups; this will fail in version 2023.3. Please report issue to the custom integration author for using this method at , line XXX: hass.config_entries.async_setup_platforms(entry, PLATFORMS)
message. :(
Now on HA version 2023.5.0 it fail to start with:
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/config_entries.py", line 387, in async_setup
result = await component.async_setup_entry(hass, self)
File "/config/custom_components/blueair/init.py", line 50, in async_setup_entry
hass.config_entries.async_setup_platforms(entry, PLATFORMS)
AttributeError: 'ConfigEntries' object has no attribute 'async_setup_platforms'