nc-kaos
nc-kaos
I know I did not report this issue, but I have exactly same problem: please find screenshot below. 
To add to things, I recreated API request using Postman and it was successful - it returned my ID and access_token.
Exactly same issue for me, restarted multiple times, run fig login, fig doctor shows no issues. Same hardware as @thomasverleye it would appear, macOS 12.4.0.