No login possible anymore after upgrade from 10 to 11

After upgrading from 10 to 11.0.13 today - non-docker installation - I can’t login anymore in seahub. (also desktop clients can’t login anymore)

Error simply is: “Incorrect email or password”

Looking into the DB, the users are still there, with the correct mail addresses and password fields seem filled.

Any help very welcome, what could be wrong.

(not using any 3rd party auth backends, just plain seafile)

Found this in the logs meanwhile

…/common/seaf-db.c(867): Failed to connect to MySQL: Plugin caching_sha2_password could not be loaded: /usr/lib/mariadb/plugin/caching_sha2_password.so: cannot open shared object file: No such file or directory

Server is Ubuntu 22.04. MariaDB client is not installedl, but mysql-client is.

related: Seafile CE 11.0.2, Seahub failed to start, Ubuntu 22.04

Seafile uses the mysql_native_password plugin for authentication.

https://manual.seafile.com/latest/deploy/using_mysql/

explains everything. Sad that Seafile is so behind here.