I assume you were able to login with your account before and now you are not able anymore ? It’s not the first time you are login in with your Github account ?
I also noticed that your account seems to also be linked with a Gitlab and Bitbucket account, are you still able to login on those ?
Finally, did you do any changes to your Github account recently ? Like changing the associated email or something similar ?
I do not recall having used sonarcloud.io before trying to signup a few days ago. That’s when I got this error. I might have changed my associated Github email at some point.
Hope that helps in figuring out what the error is
Let me know if you need more information.