Fatal error: Uncaught Error: Class 'IMSGlobal\LTI\OAuth\OAuthSignatureMethod' not found in /home/aefn/public_html/moodle/lib/ltiprovider/src/OAuth/OAuthSignatureMethod_HMAC_SHA256.php:20 Stack trace: #0 {main} thrown in /home/aefn/public_html/moodle/lib/ltiprovider/src/OAuth/OAuthSignatureMethod_HMAC_SHA256.php on line 20