my music score keeps saying that "this score is invalid" when I try to open it

• Sep 24, 2024 - 01:40

I have been working on this score for over a week and not had a problem with it. then I close the score tonight and when I reopen it to double check that it has been saved I keep getting this same error message that says "this score could not be opened" "this score is invalid"
if anyone could Please help me with this because its been a lot of work put into this score and I don't want to lose it

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