MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1146 - Table 'frndorg_forum.frnd_users' doesn't exist
SELECT u.*, e.* FROM frnd_events e LEFT JOIN frnd_users u ON (u.uid=e.uid) WHERE e.cid='1' AND e.visible='1' AND ((e.endtime>=1577620800 AND e.starttime<=1583063999) OR (e.endtime=0 AND e.starttime>=1577620800 AND e.starttime<=1583063999)) AND ((e.uid='0' AND private='1') OR private!='1') ORDER BY endtime DESC