TypeError: dokuwiki\plugin\gallery\classes\ListGallery::__construct(): Argument #2 ($options) must be of type dokuwiki\plugin\gallery\classes\Options, __PHP_Incomplete_Class given, called in /config/dokuwiki/lib/plugins/gallery/syntax/main.php on line 86

An unforeseen error has occured. This is most likely a bug somewhere. It might be a problem in the gallery plugin.

More info has been written to the DokuWiki error log.