then your hoster cannot read , cannot be asked or doesn’t know what he is talking about . (or possibly all three)
It clearly says in your debug
[25-Aug-2023 00:54:18 UTC] PHP Notice: session_start() [<a href='https://secure.php.net/manual/en/function.session-start.php'>function.session-start.php</a>]: ps_files_cleanup_dir: opendir(/var/cache/php-sessions) failed: Permission denied
i.e the session cannot be started because the permission is denied to where the sessions are stored. this has 1000% zero to do with the plugin and all to do with the server setup. Updating the plugin will do absolutely nothing