Fatal error: Uncaught Error: Class "Symfony\Component\Security\Guard\AbstractGuardAuthenticator" not found in /home/ldt/public_html/canvas/udoit/vendor/knpuniversity/oauth2-client-bundle/src/Security/Authenticator/SocialAuthenticator.php:26 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/knpuniversity/oauth2-client-bundle/src/Security/Authenticator/SocialAuthenticator.php on line 26