Ionic App Won't Load In Browser Anymore - Just Shows White Screen

I have built this entire application on a specific computer. I copied the files off to a different computer to do some work there. Now, the original app just loads a blank screen with a URL that does not contain the #, while the app on the new computer serves to the browser just fine adding the #. I’ve even copied the one from the computer that is working and served it and still nothing. What could have happened?

Get to the console in the browser (usually right click, Inspect and then click the Console tab) and there are probably lots of error message that will give you a good clue as to were to look.