Fatal error: Uncaught Error: Class "Eher\OAuth\SignatureMethod" not found in /opt/app-root/src/wp-content/plugins/xyz-wp-smap/vendor/eher/oauth/src/Eher/OAuth/PlainText.php:10 Stack trace: #0 {main} thrown in /opt/app-root/src/wp-content/plugins/xyz-wp-smap/vendor/eher/oauth/src/Eher/OAuth/PlainText.php on line 10