When signed out, click "Log in" at the top right of the site. Then click "Log in with GitHub" on the modal that appears. Nothing seems to happen. In console, I see:
15:09:40.043 Uncaught (in promise) TypeError: this.login.externalLogin is not a function
externalLoginAction login.js:320
_run index.ts:665
_join index.ts:640
join index.ts:362
Ember 5
login.js:320:15
I have reset the client secret and successfully reproduced the issue registering a new user with a different GitHub account in a different browser (successful) - but after logging out I was unable to log back in using the 'Log in with Github' button either.