Fatal error: Uncaught mysqli_sql_exception: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'ecobtoolwebsite.event.event_id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by in /var/www/econiwas/class/Display.php:1098
Stack trace:
#0 /var/www/econiwas/class/Display.php(1098): mysqli->prepare('SELECT * FROM `...')
#1 /var/www/econiwas/eventsfilterbycalender.php(75): Display->ShowEventSearchByCalendar()
#2 {main}
thrown in /var/www/econiwas/class/Display.php on line 1098
