Can't open project due to "Corrupt" .mb file

We are trying to get a project on a computer in the office that is consistently failing the import due to a corrupt .mb file. We have tried transferring the project both through the asset server and through a project export.

The troubled computer has opened, operated and interacted with dozens of other projects with no issue now and in the past.

When we remove the referenced .mb file, it falls back to another corrupt file, and we have not tried to manually clean it up any further.

Any thoughts on what could be wrong?

What does Unity Editor log says?

You could try exporting your file to FBX using FBXMayaExport.mel (can be foudn in Unity application folder). It could give you some indication where it fails.