Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'problems.id' in 'where clause' in /www/wwwroot/abyss_se_oj/includes/Database.php:32 Stack trace: #0 /www/wwwroot/abyss_se_oj/includes/Database.php(32): PDO->prepare() #1 /www/wwwroot/abyss_se_oj/includes/Problem.php(60): Database->query() #2 /www/wwwroot/abyss_se_oj/problems.php(22): Problem->getList() #3 {main} thrown in /www/wwwroot/abyss_se_oj/includes/Database.php on line 32