Intermittently getting 'Unable to retrieve stored state!'

I’m using the Google OAUth2 provider and for some reason we are getting the error below intermittently:

authomatic: Google: Continuing OAuth 2.0 authorization procedure after redirect.
authomatic: Google: Validating request by comparing request state with stored state.
authomatic: Google: Reported suppressed exception: FailureError('Unable to retrieve stored state!',)!
authomatic: Google: Procedure finished.
 Error during authentication flow Unable to retrieve stored state!

See below how I’m initializing Webapp2Session:

session = Webapp2Session(self, session=self.session)

Any clue on what could be causing this ?

Thanks in advance Fábio

[mrichar1]

@xch91 If you do find out the issue in the browser, please let us know so we can document/expect it.

[mrichar1]

After several years of inactivity, authomatic is now under community management, and we have just released a new stable version (1.0.0).

We are now reviewing all issues and PRs and hoping to begin work to solve as many of these as possible.

We are keen to find out which issues still apply, and which PRs are still required/are likely to merge cleanly into the current code. We are aiming to review them all, but any help with prioritisation would be very useful!

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