Solved: Reason: The response was received at http://somsite/oauth2/callback/saml instead of https://somsite/oauth2/callback/saml
To solve this issue you need to add :
X-Forwarded-Proto: https
in your load balancer configuration.
Solved: Reason: The response was received at http://somsite/oauth2/callback/saml instead of https://somsite/oauth2/callback/saml in SonarQube