Logbook not active after upgrade to 2.6.2

[lbismarck]

Hi all,

HNY!

I kind of successfully upgraded to 2.6.2 by copying the zip file across the files on the server. Cleared cache and logged in again. Now everything seems fine except in the menu under Logbook>Overview it says no logbooks were found even though I have my main logbook active under Station Logbooks and all Station Locations are linked to it.
Also under Logbook>Advanced I am getting an error message:

Of course I checked config.php and cloudlog.php and entered my settings.

Thanks a lot for your help!

[lbismarck]

I now changed the PHP Version from 8.0 to 8.2 and now https://cloudlog.cqdx.me/logbook gives me HTTP ERROR 500