Compiling Error - "Location is Not Available" Message

I am currently working off the trial version of Scrivener which may be the problem. I have a document I’d like to compile. But every time I try, I get a “Location is Not Available” message, which states that perhaps my document is in a different spot or on a disc, etc. It is not. It’s exactly where the message states it is not. Is this because I’m using the trial version?

Originally, I was working with this on another computer. I moved it here to my new computer, and I can see that the path is correct.

Any suggestions? I’m stumped.