Hi @Anonymous
Thank you for posting your question on the AppDynamics Community.
A SAML authentication failure occurs mainly due to one or several of the following reasons:
Please make sure that the email address you are using is the right one and let us know if you are able to access the Controller. Feel free to update the thread if you still having the issue.
If you have already figured out how to fix the SAML issue, please post your solution so as to benefit others with similar issues.