Fatal error: Uncaught Error: Call to undefined method DateTime::createFromFormat() in C:\AppServ\www\vendor\symfony\http-foundation\Response.php:212
Stack trace:
#0 C:\AppServ\www\phpbb\event\kernel_exception_subscriber.php(105): Symfony\Component\HttpFoundation\Response->__construct('\t<!DOCTYPE html...', 500)
#1 C:\AppServ\www\vendor\symfony\event-dispatcher\EventDispatcher.php(184): phpbb\event\kernel_exception_subscriber->on_kernel_exception(Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent), 'kernel.exceptio...', Object(phpbb\event\dispatcher))
#2 C:\AppServ\www\vendor\symfony\event-dispatcher\EventDispatcher.php(46): Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(Array, 'kernel.exceptio...', Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent))
#3 C:\AppServ\www\phpbb\event\dispatcher.php(62): Symfony\Component\EventDispatcher\EventDispatcher->dispatch('kernel.exceptio...', Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent))
#4 C:\AppServ\ww in C:\AppServ\www\vendor\symfony\http-foundation\Response.php on line 212