Another (less obnoxious) user has worked out that it seems to be a GitHub issue specifically affecting Brazil (and maybe broader South America): Error: Response status code does not indicate success: 429 (Too Many Requests)
Another (less obnoxious) user has worked out that it seems to be a GitHub issue specifically affecting Brazil (and maybe broader South America): Error: Response status code does not indicate success: 429 (Too Many Requests)