🐛 bug report
Description of the problem
We use CodeSandbox extensively for open-source demoing. Unfortunately, our sandboxes that rely on the built-in GitHub integration are showing a "Bad Credentials" error on every browser:

How has this issue affected you? What are you trying to accomplish?
Our demos/onboarding is completely broken. First impressions are hard to fix.
Link to sandbox:
https://codesandbox.io/s/github/MagicLabs/example-hello-world
Your Environment
| Software |
Name/Version |
| Сodesandbox |
e3a6940fd |
| Browser |
Firefox/Chrome/Safari |
| Operating System |
macOS 10.15.6 |