MySQL error in file: /engine/modules/calendar.php at line 182

Error Number: 1142

The Error returned was:
SELECT command denied to user 'srv51547_zilla'@'localhost' for table 'dle_post'

SQL query:

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