'Error Loading Mission'. What is this,please?

[magomar]

I'm having the same problem
Only thing I have changed just before experiencing this problem is the instalation of a new Headset with 7.1 surround sound (Logitech G930).
Actually, in one attempt that I have been able to load a game without getting the error, but the headset was not working.
That fact make me suspicious of some relation between that error (related with sound files) and the referred headset.
Some ideas on this?