Google SSO (OAuth) Signup failure when using fullscreen login/signup

Recently set up a new discourse (Discourse v3.4.0.beta3-dev) on a fresh vps.

When I enable Google Oauth and head to the /signup page and sign up with a new Google user everything goes through Google just fine, however when the Oauth returns to my site I get a JS error in the console of:

rsvp.js:23 Uncaught TypeError: Cannot read properties of undefined (reading 'set')
    at auth-complete.js:145:38
    at Array.forEach (<anonymous>)
    at auth-complete.js:144:57
    at _ (rsvp.js:434:1)
    at y (rsvp.js:420:1)
    at invoke (backburner.js.js:282:1)
    at d.flush (backburner.js.js:197:1)
    at p.flush (backburner.js.js:358:1)
    at B._end (backburner.js.js:798:1)
    at B.end (backburner.js.js:589:1)
    at B._runExpiredTimers (backburner.js.js:905:1)

However, if I go to the /login page and do the same it works just fine.

The bug also happened when I tried to sign up here so it’s not just an issue with my install.

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After a bit more playing around, if I disable the experimental full page login setting the signup works fine.

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Thanks @MrSleeps for reporting this one! It should be fixed now. The social signups should work when using the experimental fullpage login.

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