I've been going through the error logs to troubleshoot some issues. I found the copied error. I don't know whether it's important or not.
PHP Fatal error: Uncaught Error: Undefined class constant 'MYSQL_ATTR_USE_BUFFERED_QUERY' in /public_html/classes/db/DbPDO.php:73\nStack trace:\n#0 /public_html/classes/db/DbPDO.php(117): DbPDOCore::_getPDO('localhost', 'lfdsakjf', 'ljljlkjlkj', 'lfdsakjf', 5)\n#1 /public_html/classes/db/Db.php(338): DbPDOCore->connect()\n#2 /public_html/classes/db/Db.php(250): DbCore->__construct('localhost', 'lfdsakjf', 'ljljlkjlkj', 'lfdsakjf')\n#3 /public_html/classes/Configuration.php(421): DbCore::getInstance(0)\n#4 /public_html/classes/Configuration.php(378): ConfigurationCore::loadConfiguration()\n#5 /public_html/classes/Encryptor.php(74): ConfigurationCore::get('PS_CIPHER_ALGOR...')\n#6 /home/agsad in /public_html/classes/db/DbPDO.php on line 73