Error importing mesh after disabling SSAO [SOLVED]

Hi everyone!

I seem to have an issue with every single object I create. I've been trying to solve this for a couple of days no with no luck.

Without making changes in the warehouse, my objects have a transparency problem. Setting SSAO to 0 for every applicable LOD fixes this

and the objects show up perfectly in game. However, after changing the SSAO settings, I am no longer able to import mesh (the same or

a new one, doesn't matter). I just get a long error message.

Is this a known issue or am I missing something?