File corrupted

I've tried almost everything I could even downloaded the Repair Assistant plugin, that also had no effect.
I'm quite new on Musescore so please anybody help with my work, much would be appreciated.

Details:
Incomplete measure: Full score, measure 61, staff 2. Found: 791/1024. Expected: 3/4.
Incomplete measure: Full score, measure 62, staff 2. Found: 767/1024. Expected: 3/4.
Incomplete measure: Full score, measure 138, staff 1. Found: 1151/1536. Expected: 3/4.