Exported project won't load past 99%?

I exported my Construct project into an HTML 5 game and it works fine on my computer but when I upload it onto my server, the game won't load past 99% and the progress bar is red.

What could be causing this? I don't think it's a server related issue since another one of my projects ran just fine.

Press F12 in the browser & see what errors are being reported.

This normally is actually a server problem: either misconfigured MIME types or you just forgot to upload a file and it returns 404 not found. The browser console (Ctrl+Shift+J or F12) usually has more info.