Re: NFS UNbound - Error F03 / FOD "Inventory could not be loaded"
A few of us over on the Steam forums have worked out the following - if you delete your savedgame file from the NFS Unbound folder in My Documents, then the game will work just fine. However, you lose all cars and achievement progress. The only progress that carries over and can be worked on is your user level and speedpass progress.
It would appear as though the savefile is part of the problem.
I also found a Reddit post from a user 9 months ago who experienced the same "inventory cannot be loaded". They determined that a corrupt car model was the problem and solved their issue by deleting all cars from SP and MP. Whilst I can delete all cars from SP, I cannot from MP, Besides - I wouldn't want to do that - it's almost as bad as starting a whole new save over.