Fatal error:  Uncaught Error: Failed opening required './ext/phpbb/boardannouncements/event/listener.php' (include_path='.:/php_root/000000') in /apache$root/htdocs/vamp/phpbb/class_loader.php:160
Stack trace:
#0 /apache$root/htdocs/vamp/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3715): phpbb\class_loader->load_class('\\phpbb\\boardann...')
#1 /apache$root/htdocs/vamp/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(2338): phpbb_cache_container->getPhpbb_Boardannouncements_ListenerService()
#2 /apache$root/htdocs/vamp/vendor/symfony/event-dispatcher/EventDispatcher.php(231): phpbb_cache_container->{closure}()
#3 /apache$root/htdocs/vamp/vendor/symfony/event-dispatcher/EventDispatcher.php(61): Symfony\Component\EventDispatcher\EventDispatcher->sortListeners('core.page_heade...')
#4 /apache$root/htdocs/vamp/vendor/symfony/event-dispatcher/EventDispatcher.php(43): Symfony\Component\EventDispatcher\EventDispatcher->getListeners('core.page_heade...')
#5 /apache$root/htdocs/vamp/phpbb/event/dispatcher.php(62): Symfony\Component\EventDispatcher\EventDispatcher->dispatch('core.page_heade...', Object(phpbb\event\data))
#6 /apache$root/htdocs/vamp/phpbb/event/dispatcher.php(46): phpbb\event\dispatcher->dispatch('core.page_heade...', Object(phpbb\event\data))
#7 /apache$root/htdocs/vamp/includes/functions.php(4187): phpbb\event\dispatcher->trigger_event('core.page_heade...', Array)
#8 /apache$root/htdocs/vamp/viewtopic.php(2419): page_header('Installation', true, 17)
#9 {main}
  thrown in /apache$root/htdocs/vamp/phpbb/class_loader.php on line 160