Fatal error:  Uncaught Error: Failed opening required './phpbb/controller/helper.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(1750): phpbb\class_loader->load_class('\\phpbb\\controll...')
#1 /apache$root/htdocs/vamp/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3745): phpbb_cache_container->getController_HelperService()
#2 /apache$root/htdocs/vamp/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3735): phpbb_cache_container->getPhpbb_Collapsiblecategories_OperatorService()
#3 /apache$root/htdocs/vamp/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(2341): phpbb_cache_container->getPhpbb_Collapsiblecategories_ListenerService()
#4 /apache$root/htdocs/vamp/vendor/symfony/event-dispatcher/EventDispatcher.php(231): phpbb_cache_container->{closure}()
#5 /apache$root/htdocs/vamp/vendor/symfony/event-dispatcher/EventDispatcher.php(61): Symfony\Component\EventDispatcher\EventDispatcher->sortListeners('core.user_setup')
#6 /apache$root/htdocs/vamp/vendor/symfony/event-dispatcher/EventDispatcher.php(43): Symfony\Component\EventDispatcher\EventDispatcher->getListeners('core.user_setup')
#7 /apache$root/htdocs/vamp/phpbb/event/dispatcher.php(62): Symfony\Component\EventDispatcher\EventDispatcher->dispatch('core.user_setup', Object(phpbb\event\data))
#8 /apache$root/htdocs/vamp/phpbb/event/dispatcher.php(46): phpbb\event\dispatcher->dispatch('core.user_setup', Object(phpbb\event\data))
#9 /apache$root/htdocs/vamp/phpbb/user.php(232): phpbb\event\dispatcher->trigger_event('core.user_setup', Array)
#10 /apache$root/htdocs/vamp/app.php(28): phpbb\user->setup('app')
#11 {main}
  thrown in /apache$root/htdocs/vamp/phpbb/class_loader.php on line 160