MySQL error in file: /engine/modules/calendar.php(11) : eval()'d code(3) : eval()'d code at line 167

Error Number: 1146

The Error returned was:
Table 'gundem01_xeb.dle_post' doesn't exist

SQL query:

SELECT DISTINCT DAYOFMONTH(date) as day FROM dle_post WHERE date >= '2019-04-01' AND date < '2019-04-01' + INTERVAL 1 MONTH