Musescores Pro+

. Please explain and help. I have purchased two subscriptions "Musacore Pro+" and "Musascore Lern Lite". In the "Files" folder on iPad and ephone there are scores in MSCz which I then uploaded "Notes in off-line mode" and played. A few days ago this option was inactive. Instead of the score there is a blank page in purple. Please help me how to use the previous options. Best regards, Lech