So in the case before, I was trying to "Export" as a workaround instead of trying to use Save/Save As, and I got that error above.
This time, when I tried to intentionally "Save As" on my desktop using a copy of another png document, I got this error, but with more details:
Error #3003
Error: Error #3003
at pyx.io::AsyncIOManager/onResult()
at Function/<anonymous>()
at com.myflashlabs.utils.worker::WorkerManager/onMessage()
This is all weird, I'm not even sure what's going on anymore.
I'm trying to do some testing with where and how I can save a file, and what methods I'm using.
I was able to Save a file in one directory (C:/users/[user]), but saving to places like my desktop or documents was unsuccessful.
I'll try and return with more information as I get it.