My file cannot be opened suddenly -- Cannot read file C:...

• Aug 9, 2022 - 10:20
Reported version
3.6
Type
Functional
Frequency
Once
Severity
S2 - Critical
Reproducibility
Always
Status
duplicate
Regression
No
Workaround
No
Project
MuseScore

Hello!
I had been working on a Jazz Re-harmonization of the song Married Life from the movie Up, and considered it to be one of my best works. I need it for an upcoming lesson as my hand in, but when I try to open it, I get a message saying: Cannot read file C: (The scores location) Married_Life_(Up).mscz:
The issue appeared randomly for no apparent reason, since I'd done nothing to the file before this happened. I have tried to search for help online, but couldn't find any walk-throughs that would lead me step by step.
I have provided the file underneath.

Attachment Size
Married_Life_(Up).mscz 25.95 KB

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