MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1146 - Table 'prietena_mybb.mybb_posts' doesn't exist
Query:
SELECT u.uid, u.username, COUNT(*) AS poststoday FROM mybb_posts p LEFT JOIN mybb_users u ON (p.uid=u.uid) WHERE p.dateline > 1513293779 GROUP BY p.uid ORDER BY poststoday DESC LIMIT 1