There was a problem with your log in Error: There was an issue decoding the token

Hi there,
I am trying to configure an [Auth0 WordPress plugin][1] but I cannot get it to work. I follow this manual: Configure Login by Auth0 and trying to log in with Google Account but I get the message:

There was a problem with your log in
Error: There was an issue decoding the
token.

I have noticed other similar threads here but with no resolution yet. Every case can be different so I have decided to submit my own issue.
[EDIT] and the error I have in my logs is:

Section: redirect_login/decode and
Message Signature verification
failed.

I would appreciate your help on it.
regards,
Przemek
[1]: Login by Auth0 – WordPress plugin | WordPress.org