Exporting "an unknown error has occured

I'm just trying to export a psd to png, and it's my third one tonight but all of a sudden it has an error. 

I've tried literally everything I can find on these forums:

Cleared Preferences and restarting Photoshop

Restarted my Laptop

Reinstall Photoshop

I don't know what else to do. Please help if you have any solutions.

-B