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 >= '2015-12-01' AND date < '2015-12-01' + INTERVAL 1 MONTH