Sonarqube SAML gave error: You're not authorized to access this page. Please contact the administrator

Hello Team,
SonarQube with IIS as proxy server integrated with saml for authentication. but still getting issue as
"You’re not authorized to access this page. Please contact the administrator.

Reason: The response was received at http://local url/oauth2/callback/saml instead of AFD domina url/oauth2/callback/saml"
also followed the SAML post still the issue persists.
Any help would be highly appreciable, struggling with this issue for last 2 days which is prod instance.

Regards
Senthil