Das hier steht im Log:
[Thu Jan 19 23:10:17.817169 2017] [:error] [pid 66870] [client 5.187.21.99:23704] PHP Fatal error: Uncaught TypeError: Argument 5 passed to pico\\autodbbackup\\cron\\task\\auto_db_backup::__construct() must be an instance of phpbb\\db\\tools, instance of phpbb\\db\\tools\\tools given, called in /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php on line 3157 and defined in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php:26\nStack trace:\n#0 /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3157): pico\\autodbbackup\\cron\\task\\auto_db_backup->__construct('./', 'php', Object(phpbb\\config\\db), Object(phpbb\\db\\driver\\factory), Object(phpbb\\db\\tools\\tools), Object(phpbb\\log\\log), Object(phpbb\\user))\n#1 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/Container.php(314): phpbb_cache_container->getPico_Autodbbackup_Cron_Task_Core_AutoDbBackupService()\n#2 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/ContainerBuilder.php(447): Symfony\\Component\\DependencyInjection\\Container->get('pico.autodbback...', 2)\n#3 /var/www/gi in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php on line 26
[Thu Jan 19 23:10:18.388662 2017] [:error] [pid 49925] [client 5.187.21.99:23705] PHP Fatal error: Uncaught TypeError: Argument 5 passed to pico\\autodbbackup\\cron\\task\\auto_db_backup::__construct() must be an instance of phpbb\\db\\tools, instance of phpbb\\db\\tools\\tools given, called in /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php on line 3157 and defined in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php:26\nStack trace:\n#0 /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3157): pico\\autodbbackup\\cron\\task\\auto_db_backup->__construct('./', 'php', Object(phpbb\\config\\db), Object(phpbb\\db\\driver\\factory), Object(phpbb\\db\\tools\\tools), Object(phpbb\\log\\log), Object(phpbb\\user))\n#1 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/Container.php(314): phpbb_cache_container->getPico_Autodbbackup_Cron_Task_Core_AutoDbBackupService()\n#2 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/ContainerBuilder.php(447): Symfony\\Component\\DependencyInjection\\Container->get('pico.autodbback...', 2)\n#3 /var/www/gi in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php on line 26
[Thu Jan 19 23:10:18.513247 2017] [:error] [pid 64770] [client 5.187.21.99:23708] PHP Fatal error: Uncaught TypeError: Argument 5 passed to pico\\autodbbackup\\cron\\task\\auto_db_backup::__construct() must be an instance of phpbb\\db\\tools, instance of phpbb\\db\\tools\\tools given, called in /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php on line 3157 and defined in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php:26\nStack trace:\n#0 /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3157): pico\\autodbbackup\\cron\\task\\auto_db_backup->__construct('./', 'php', Object(phpbb\\config\\db), Object(phpbb\\db\\driver\\factory), Object(phpbb\\db\\tools\\tools), Object(phpbb\\log\\log), Object(phpbb\\user))\n#1 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/Container.php(314): phpbb_cache_container->getPico_Autodbbackup_Cron_Task_Core_AutoDbBackupService()\n#2 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/ContainerBuilder.php(447): Symfony\\Component\\DependencyInjection\\Container->get('pico.autodbback...', 2)\n#3 /var/www/gi in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php on line 26
[Thu Jan 19 23:10:20.618431 2017] [:error] [pid 40227] [client 207.241.225.235:42150] PHP Fatal error: Uncaught TypeError: Argument 5 passed to pico\\autodbbackup\\cron\\task\\auto_db_backup::__construct() must be an instance of phpbb\\db\\tools, instance of phpbb\\db\\tools\\tools given, called in /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php on line 3157 and defined in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php:26\nStack trace:\n#0 /var/www/girc/phpBB3/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3157): pico\\autodbbackup\\cron\\task\\auto_db_backup->__construct('./', 'php', Object(phpbb\\config\\db), Object(phpbb\\db\\driver\\factory), Object(phpbb\\db\\tools\\tools), Object(phpbb\\log\\log), Object(phpbb\\user))\n#1 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/Container.php(314): phpbb_cache_container->getPico_Autodbbackup_Cron_Task_Core_AutoDbBackupService()\n#2 /var/www/girc/phpBB3/vendor/symfony/dependency-injection/ContainerBuilder.php(447): Symfony\\Component\\DependencyInjection\\Container->get('pico.autodbback...', 2)\n#3 /var/www/gi in /var/www/girc/phpBB3/ext/pico/autodbbackup/cron/task/auto_db_backup.php on line 26