Crash of iPhone app when opening file

Hello,

I wrote a small piece of piano to learn to play a 4 hand piece on piano for my exam.

Since today (I think with the last update) when I open the piece, MuseScore crashes. Before it was playing correctly.

I tried to download again the piece and to reinstall the application, but this doesn’t solve my issue.

Others pieces can be opened and played normally.

What should I do ?

Could you please help me

Thanks in advance

Michel