Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, false given in /htdocs/phpbb/db/driver/mysqli.php:200 Stack trace: #0 /htdocs/phpbb/db/driver/mysqli.php(200): mysqli_query(false, 'select group_id...') #1 /htdocs/phpbb/db/driver/factory.php(345): phpbb\db\driver\mysqli->sql_query('select group_id...', 0) #2 /htdocs/ext/marttiphpbb/grouptempvars/event/listener.php(53): phpbb\db\driver\factory->sql_query('select group_id...') #3 /htdocs/vendor/symfony/event-dispatcher/EventDispatcher.php(214): marttiphpbb\grouptempvars\event\listener->core_twig_environment_render_template_before(Object(phpbb\event\data), 'core.twig_envir...', Object(phpbb\event\dispatcher)) #4 /htdocs/vendor/symfony/event-dispatcher/EventDispatcher.php(44): Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(Array, 'core.twig_envir...', Object(phpbb\event\data)) #5 /htdocs/phpbb/event/dispatcher.php(62): Symfony\Component\EventDispatcher\EventDispatcher->dispatch('core.twig_envir...', Object(phpbb\event\data)) #6 /htdocs/phpbb/event/dispatcher.php(46): phpbb\event\dispatcher->dispatch('core.twig_envir...', Object(phpbb\event\data)) #7 /htdocs/phpbb/template/twig/environment.php(221): phpbb\event\dispatcher->trigger_event('core.twig_envir...', Array) #8 /htdocs/phpbb/template/twig/environment.php(186): phpbb\template\twig\environment->display_with_assets('message_body.ht...', Array) #9 /htdocs/phpbb/template/twig/twig.php(335): phpbb\template\twig\environment->render('message_body.ht...', Array) #10 /htdocs/phpbb/event/kernel_exception_subscriber.php(105): phpbb\template\twig\twig->assign_display('body') #11 /htdocs/vendor/symfony/event-dispatcher/EventDispatcher.php(214): phpbb\event\kernel_exception_subscriber->on_kernel_exception(Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent), 'kernel.exceptio...', Object(phpbb\event\dispatcher)) #12 /htdocs/vendor/symfony/event-dispatcher/EventDispatcher.php(44): Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(Array, 'kernel.exceptio...', Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent)) #13 /htdocs/phpbb/event/dispatcher.php(62): Symfony\Component\EventDispatcher\EventDispatcher->dispatch('kernel.exceptio...', Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent)) #14 /htdocs/vendor/symfony/http-kernel/HttpKernel.php(227): phpbb\event\dispatcher->dispatch('kernel.exceptio...', Object(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent)) #15 /htdocs/vendor/symfony/http-kernel/HttpKernel.php(79): Symfony\Component\HttpKernel\HttpKernel->handleException(Object(Symfony\Component\HttpKernel\Exception\NotFoundHttpException), Object(phpbb\symfony_request), 1) #16 /htdocs/app.php(35): Symfony\Component\HttpKernel\HttpKernel->handle(Object(phpbb\symfony_request)) #17 {main} thrown in /htdocs/phpbb/db/driver/mysqli.php on line 200