Fatal error: Uncaught Error: Class "League\OAuth2\Client\Provider\AbstractProvider" not found in /home/telefonai/public_html/test.telefonai.eu/templates/__MACOSX/vendor/verbb/auth/src/clients/constantcontact/provider/ConstantContact.php:9 Stack trace: #0 {main} thrown in /home/telefonai/public_html/test.telefonai.eu/templates/__MACOSX/vendor/verbb/auth/src/clients/constantcontact/provider/ConstantContact.php on line 9