wisej.wx not loading

I have been trying to debug why a button wouldn’t fire a click event.

Double checked default.json and default.html. Nothing seemed wrong. This button was a copy of another one just changed the click event.

Then suddenly, won’t run at all.

Chrome starts up but DevTool/console says: wisej.wx:1

Failed to load resource: the server responded with a status of 500 (Internal Server Error)

I have unstalled both Wisej-3 and Wisej-3-DevExtreme packages and reinstalled them but I still have the issue.

I need help as I’m dead in the water!