Fatal error: Uncaught Error: Interface "WPOAuth2\ResponseInterface" not found in /var/www/eintrachtpodcast/wp-content/plugins/oauth2-provider/library/WPOAuth2/Response.php:14 Stack trace: #0 {main} thrown in /var/www/eintrachtpodcast/wp-content/plugins/oauth2-provider/library/WPOAuth2/Response.php on line 14