Thread:Project:Support desk/No login page after 1.21.3 to 1.22 upgrade - Uncommitted DB writes?/reply (13)

For the notice, you should disable error reporting for E_NOTICE. For example:

Note that having $wgJobRunRate = 0; cause jobs to not being run, so you must manually run runJobs.php periodically to run them, needed to refresh links, etc.