Cannot read file: bad format, XML error

greetings to all the helpers
In the process of arranging a piece, Musescore had unexpectedly crashed. I tried to open the file once again, and this message appeared:

Cannot read file: bad format
XML read error at line 154214, column 0:

I checked the XML through a text editor and problem finder, but is seems that there isn't any problem. I realize that I am not the only one who encountered this problem. Is there any solution?

I have attached the mscx and XML zip files, because the original files are unfortunately too big . it is quite urgent - so any help I could get would be very much appreciated. Thank you!