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 /confereneceLV/universal_code/abstract-submission.php:39 Stack trace: #0 /confereneceLV/universal_code/abstract-submission.php(39): mysqli_query() #1 {main} thrown in /confereneceLV/universal_code/abstract-submission.php on line 39