[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/datetime.php on line 174: Declaration of DateTime::mysqlnd($interval) should be compatible with DateTime::mysqlnd($year, $month, $day)

Fatal error: Uncaught Error: Call to undefined method phpbb\datetime::getOffset() in C:\AppServ\www\includes\functions.php:4406 Stack trace: #0 C:\AppServ\www\includes\functions.php(2201): page_header('Delete cookies') #1 C:\AppServ\www\ucp.php(212): confirm_box(false, 'DELETE_COOKIES', '') #2 {main} thrown in C:\AppServ\www\includes\functions.php on line 4406