This is what MuseScore says when opening the file linked above.
Measure 75, staff 1 incomplete. Expected: 4/4; Found: 25/24
Measure 75, staff 1, voice 2 too long. Expected: 4/4; Found: 33/32
Measure 79, staff 1 incomplete. Expected: 4/4; Found: 104/96
Measure 276, staff 1, voice 2 too long. Expected: 4/4; Found: 27/24