I could not log on my original account throught SSO on askubuntu.

I've tryed on Firefox, Chromium (fresh install with the purpose of this test, no extension).

How to reproduce:

1. New private window: askubuntu.com
2. Click on Log in
3. Choose Log in with Launchpad
4. You are redirected to Ubuntu SSO log in form
5. Log in, it ask you if you are OK to log on launchpad
6. Click Yes, you are redirected to launchpad, with many question about how you want to give access to your lp account
7. Select an option (no access, Read Non-Private data, Change Non-Private data, Read Anything, Change Anything)
8. You are redirected on askubuntu with an error message:
9. Launchpad Login Failed. Please try logging in again.
10. you can try again with any other options at step 7. (I've tryed them all, all failed)

Looks like an oidc error, or a config somewhere between askubuntu/ubuntuSSO/launchpad.

"Is it just me" ? :)