Question Moving to another server

Hello everyone!
Moved webtrees from Ubuntu 20.04 to ubuntu 22.04. Now I get a lot of errors:
Error: Class "Fisharebest\webtrees\CustomTags\Aldfaer" not found in /home/public_html/app/Gedcom.php:1127 Stack trace: #0 /home/public_html/app/Http/Middleware/RegisterGedcomTags.php(52): Fisharebest\webtrees\Gedcom->registerTags() #1 /home/public_html/vendor/oscarotero/middleland/src/Dispatcher.php(136):
there's still a whole page of errors. How to cure it? thanks.

I'm sorry to bother you. I solved the problem myself. I just moved an earlier version of the archive. Perhaps without any updates.

I had the same problem. Error was caused by www-data not owning the webserver directory.

sudo chown -R www-data:www-data <dir> solved the problem