Missing file causing argument exception

I am using Unity 2020.1.17f1. I am getting the following error


The file isn't there. I deleted the folder ummorpg so the path isn't even there but still getting this error. Not sure how to fix it.

 

What does the full stack trace look like? Is this coming from one of your scripts?

 

That error (taken out of context) doesn't have anything to do with whether a file is missing or not -- it's complaining that you're adding the same key to a dictionary twice. I would focus on why that might be happening first.