Qt: fonts are missing on OpenSUSE and style looks crippled

This is the snapcraft file: https://github.com/huggle/huggle3-qt-lx/blob/master/snap/snapcraft.yaml

This is how the application should look:

This is how the application looks on OpenSUSE: Untitled

I think something is missing (fonts and style?) but no idea how to fix it, which packages should I bundle?

Are there any relevant messages printed on the console when you run your app on OpenSUSE? Or any denial messages in the dmesg output?

I am facing the same problem and would like to get this application running again, due to my frequent usage. I’m not part of the development team, nor do I have experience with snap besides installing it.

When running the software, dmesg does not show any denial messages related to the issue.

Attached is a copy of the logs when running, hopefully it helps.