SSO Login issue

Hello everyone.
Apologies, if this question was already posted on the forum. :pray:

A simple question here: has anyone faced the problem with the SSO login these days?

We are using a Discourse SSO on our forum ( and, unfortunately, it appears to be impossible for the new/old users to enter the platform because of the following error:

We have made some investigation of the problem and it only seems like it is because of the D-e SSO. If anyone could throw some light on this, it will be super highly appreciated.

Humble thanks. :slightly_smiling_face: