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