Yes, that works fine. The problem seems to be (my guess, I haven't looked at it much) when processing the response from https://skyline.github.com/api/contribu

Yes, that works fine. The problem seems to be (my guess, I haven't looked at it much) when processing the response from https://skyline.github.com/api/contributions https://skyline.github.com/api/contributions I can see a correct response on the Network tab with apparently good data. But then it shows the error without even trying to do anything else. Add: Just for info: Firefox 85.0.2 (64-bit). No add-ons. Win10. No problems at all regarding WebGL.