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 'Group By collaborators.Surname, collaborators.Prename, picturesmain.Copyright...' at line 5 in /var/www/html/photos/ListThumbnails.php:36 Stack trace: #0 /var/www/html/photos/ListThumbnails.php(36): mysqli->query() #1 {main} thrown in /var/www/html/photos/ListThumbnails.php on line 36