Hi,
One of our users is getting the message "You don't have permission to view this portal".
We've checked his account and profile permissions and everything seems OK.
The full array of symptons are the following:
1. He enters his email and press continue. Then gets this message (which translates as "Your group uses single sign-on"):

2. He clics the button ("Start session with single sign-on") and enters his password and then gets this:

Could anyone please help?
Thanks in advance.