Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1 in /var/www/vhosts/busyspr.com/public_html/framework/f_query.php:52
Stack trace:
#0 /var/www/vhosts/busyspr.com/public_html/framework/f_query.php(52): mysqli_query()
#1 /var/www/vhosts/busyspr.com/public_html/framework/f_db.php(108): f_query->__construct()
#2 /var/www/vhosts/busyspr.com/public_html/component/ccourse/controller.php(396): f_db->query()
#3 /var/www/vhosts/busyspr.com/public_html/framework/f_controller.php(78): c_ccourse->do_recomend()
#4 /var/www/vhosts/busyspr.com/public_html/component/ccourse/controller.php(13): f_controller->run()
#5 /var/www/vhosts/busyspr.com/public_html/framework/f_router.php(61): c_ccourse->index()
#6 /var/www/vhosts/busyspr.com/public_html/index.php(30): f_router->run_component()
#7 {main}
thrown in /var/www/vhosts/busyspr.com/public_html/framework/f_query.php on line 52