WebCore App local ok, but after upload wrong.

I have a guilty conscience for asking so often at the moment. But I can't get any further.

My project runs on the PC, but when I upload it to our web server, it doesn't work.
It seems the unit's html file (Zaboric.Main.html) is not executing correctly.

What can be the reason? Locally ok, on the web an error.

I am now emailing the original sources to support. I don't want to publish them here.

But I'll post the 2 screenshots here.
Screen local: ok
Screen web: wrong

When you host exactly the same files, I cannot see any reason for a difference.
There are no errors in the browser console?