Upload partitions created with MuseScore 4.0.2 - Problem

Hi,

Since a few days, it's impossible for me to upload partitions created
with MuseScore 4.0.2
I get the window where I fill in the different elements but when I
validate it, I get the waiting message... and the wheel doesn't stop
turning.
Impossible here to complete the upload.

The problem is solved with MuseScore 3.2.
Do others have this problem? Is there a way to solve it?
I asked the development team and they referred me to this forum.

Thanks in advance,