I’m getting no error.
No request arrives at my Apache2 (both logs, access and error, remain empty).
The XMLHTTPRequest returns with readystate === DONE, but status is 0 and response is undefined.
fetch() throws an empty error, which resolves to an empty object after a call to JSON.parse().
I hoped to get an error from browser console (or anything like that), but I couldn’t find any way to open it from inside the Twitch app.
I have no clues, that’s why I need help.