Fatal error:  Uncaught Error: Failed opening required './phpbb/cron/task/base.php' (include_path='.:/php_root/000000') in /apache$root/htdocs/vamp/phpbb/class_loader.php:160
Stack trace:
#0 /apache$root/htdocs/vamp/phpbb/cron/task/core/prune_all_forums.php(23): phpbb\class_loader->load_class('\\phpbb\\cron\\tas...')
#1 /apache$root/htdocs/vamp/phpbb/class_loader.php(160): require('/apache$root/ht...')
#2 /apache$root/htdocs/vamp/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(1894): phpbb\class_loader->load_class('\\phpbb\\cron\\tas...')
#3 /apache$root/htdocs/vamp/vendor/symfony/dependency-injection/Container.php(306): phpbb_cache_container->getCron_Task_Core_PruneAllForumsService()
#4 /apache$root/htdocs/vamp/phpbb/di/service_collection.php(57): Symfony\Component\DependencyInjection\Container->get('cron.task.core....')
#5 /apache$root/htdocs/vamp/phpbb/di/service_collection_iterator.php(44): phpbb\di\service_collection->offsetGet('cron.task.core....')
#6 /apache$root/htdocs/vamp/phpbb/cron/manager.php(93): phpbb\di\service_collection_iterator->current()
#7 /apache$root/htdocs/vamp/phpbb/cron/manager.php(111): phpbb\cron\manager->load_tasks(Object(phpbb\di\service_collection))
#8 /apache$root/htdocs/vamp/phpbb/cron/manager.php(126): phpbb\cron\manager->load_tasks_from_container()
#9 /apache$root/htdocs/vamp/phpbb/controller/helper.php(362): phpbb\cron\manager->find_one_ready_task()
#10 /apache$root/htdocs/vamp/phpbb/controller/helper.php(315): phpbb\controller\helper->set_cron_task()
#11 /apache$root/htdocs/vamp/includes/functions.php(4318): phpbb\controller\helper->display_footer(true)
#12 /apache$root/htdocs/vamp/includes/functions.php(2583): page_footer()
#13 /apache$root/htdocs/vamp/posting.php(453): login_box('', 'You need to log...')
#14 {main}
  thrown in /apache$root/htdocs/vamp/phpbb/class_loader.php on line 160