Fatal error: Uncaught Error: Class "IMSGlobal\LTI\OAuth\OAuthSignatureMethod" not found in /srv/www/htdocs/moodle/lib/ltiprovider/src/OAuth/OAuthSignatureMethod_HMAC_SHA256.php:21 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/ltiprovider/src/OAuth/OAuthSignatureMethod_HMAC_SHA256.php on line 21