A database error has occurred.  Did you forget to run maintenance/update.php after upgrading?  See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script<br />
Query: SELECT  MAX(rc_timestamp)  FROM `recentchanges`   LIMIT 1  <br />
Function: SpecialRecentChanges::checkLastModified<br />
Error: 1927 Lost connection to backend server: connection closed by peer (server3: Generated event) (database_maxscale:4006)<br />