Thanks for the help.
I didn't encounter this issue a few months ago (as seen above).
Instead of transferring the export from my Windows computer, I tried exporting the NWJS directly through Firefox on Linux.
But I get the same result no matter what I do. Even this issue:
When I tried opening the "Lib" folder, it requires me to authenticate:
Could it just be an issue on NWJS end then?
Has anyone else tried exporting their game and running on linux recently?
Thank you!