When that error happens, select the red text with your mouse and hit ctrl C. Then ctrl V it into a text document and send that to eldritchtentaclesgames @ gmail dot com. I will attempt to fix whatever the issue is.
If there are multiple issues, send them to me as separate blocks of text.
I have updated the extension to 2.1.1. I did a deep check for errors so hopefully any issues you might have been having have been worked out. Try it out and let me know.
This is the error Gdev drops while trying to run the game, typycal big red square warning: