Hi Mohib,
in the meanwhile thing had changed.
I did another post for another issue but now this post here and the other one https://support.gluu.org/single-sign-on/5183/certificate-decode-error-on-sso/#at30708
are running in the same direction.
So maybe you can look through the other post where i told that, for whatever reason, the error is gone away over the weekend ...
But no i'm getting an other error ... like i wrote in the other post.
Authentication failed: SAML login failed: ['invalid_response'] (There is no AttributeStatement on the Response)
For no further duplication, i think it is better you could follow the other post?
Marco