Git on android/ios doesn't work

### Which version of floccus are you using?

5.1.1

### How many bookmarks do you have, roughly?

1000+

### Are you using other means to sync bookmarks in parallel to floccus?

No

### Sync method

Git

### Which browser are you using? In case you are using the phone App, specify the Android or iOS version and device please.

Android 9 Honor 20

### Which version of Nextcloud Bookmarks are you using? (if relevant)

_No response_

### Which version of Nextcloud? (if relevant)

_No response_

### What kind of WebDAV server are you using? (if relevant)

_No response_

### Describe the Bug

I'm importing profile from browser, which works. But I tried creating same profile from scratch and it did not work either.
Profile uses github private repository.
So I have "Failed to fetch" error after sync. And if I go to settings I get blank screen. That is why I can't attach debug logs.
You can see it on video below.

### Expected Behavior

Well, it should sync I believe.

### To Reproduce

https://github.com/floccusaddon/floccus/assets/1426349/74cceade-5eb8-4992-b9e2-f8f3ffe6322c

### Debug log provided

- [ ] I have provided a debug log file