Error 403 in the app MuseScore

Subject: 403 Error in MuseScore App 

Hello, For the past few days, I haven’t been able to open any scores in the MuseScore app on my iPad.

Each time I try, I get this message: > “Oops! The app seems to be turned off in the background, please try refreshing. status: 403”

 Here’s what I’ve already tried, but nothing worked: 

Closing and restarting the app 

Logging out and back in 

Updating the app 

Uninstalling and reinstalling the app 

Checking my internet connection 

Important detail: I can open scores perfectly in the browser and on my smartphone (where the app is also installed), so my account itself is fine.

Here is the type of iPad I have:

iPad Air 2

iPadOS 15.8.4

App version: 2.13.86

The error only happens in the app. The app support thinks there is a problem with my device and suggested me to contact you.

Could you please help me solve this issue? Thank you in advance,

melreb