Conversion doesn't seem to work anymore for recent MuseScore 4 files

[kpaede]

Hello, I wanted to work with webmscore but there seems to be an issue with recent MuseScore 4 files, because all that comes out are blank files. I uploaded the file I want to convert here (they're just a test). I tried it with https://webmscore-pwa.librescore.org/ Maybe somebody can help?

files.zip