MySQL error in file: /engine/modules/calendar.php at line 181

Error Number: 1146

The Error returned was:
Table 'user7426291_watchik.dle_post' doesn't exist

SQL query:

SELECT DISTINCT DAYOFMONTH(date) as day FROM dle_post WHERE date >= '2016-05-01' AND date < '2016-05-01' + INTERVAL 1 MONTH