Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 in /var/www/u0852628/data/www/mmostart.ru/wp-includes/wp-db.php:2030 Stack trace: #0 /var/www/u0852628/data/www/mmostart.ru/wp-includes/wp-db.php(2030): mysqli_query(Object(mysqli), 'DELETE FROM wpq...') #1 /var/www/u0852628/data/www/mmostart.ru/wp-includes/wp-db.php(1918): wpdb->_do_query('DELETE FROM wpq...') #2 /var/www/u0852628/data/www/mmostart.ru/wp-content/plugins/modal_survey/modal_survey.php(123): wpdb->query('DELETE FROM wpq...') #3 /var/www/u0852628/data/www/mmostart.ru/wp-content/plugins/modal_survey/modal_survey.php(106): modal_survey->check_participants('30') #4 /var/www/u0852628/data/www/mmostart.ru/wp-content/plugins/modal_survey/modal_survey.php(653): modal_survey->__construct() #5 /var/www/u0852628/data/www/mmostart.ru/wp-content/plugins/modal_survey/modal_survey.php(4437): modal_survey::getInstance() #6 /var/www/u0852628/data/www/mmostart.ru/wp-settings.php(360): include_once('/var/www/u08526...') #7 /var/www/u0852628/data/www/mmostart.ru/wp-config.php(98): require_once('/var/www/u08526...') #8 /var/www/u0852628/data/www/mmostart.ru/wp-load.php(37): require_once('/var/www/u08526...') #9 /var/www/u0852628/data/www/mmostart.ru/wp-blog-header.php(13): require_once('/var/www/u08526...') #10 /var/www/u0852628/data/www/mmostart.ru/index.php(17): require('/var/www/u08526...') #11 {main} thrown in /var/www/u0852628/data/www/mmostart.ru/wp-includes/wp-db.php on line 2030