[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/textformatter/s9e/factory.php on line 554: Undefined array key "attachment"

Fatal error: Uncaught TypeError: phpbb\textformatter\s9e\factory::merge_templates(): Argument #1 ($style_templates) must be of type array, null given, called in /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/phpbb/textformatter/s9e/factory.php on line 554 and defined in /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/phpbb/textformatter/s9e/factory.php:648 Stack trace: #0 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/phpbb/textformatter/s9e/factory.php(554): phpbb\textformatter\s9e\factory->merge_templates() #1 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/phpbb/textformatter/s9e/factory.php(280): phpbb\textformatter\s9e\factory->get_default_bbcodes() #2 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/phpbb/textformatter/s9e/factory.php(387): phpbb\textformatter\s9e\factory->get_configurator() #3 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/phpbb/textformatter/s9e/renderer.php(97): phpbb\textformatter\s9e\factory->regenerate() #4 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(3916): phpbb\textformatter\s9e\renderer->__construct() #5 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/vendor/symfony/dependency-injection/Container.php(306): phpbb_cache_container->getTextFormatter_S9e_RendererService() #6 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/includes/functions_content.php(584): Symfony\Component\DependencyInjection\Container->get() #7 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/includes/functions_display.php(618): generate_text_for_display() #8 /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/index.php(87): display_forums() #9 {main} thrown in /home/zlg5lm288ccq/migrated_webspace/www/BGG/forum/phpbb/textformatter/s9e/factory.php on line 648