HTML Export Problem: Exported Game works local but not on a Apache Server

I have an almost finished project that runs perfect in preview mode and the html exported version works also well on my local machine. But pushing it on a server or running it with a local server (Apache) strange things are happening.

The game loads without any failure (tested with Chrome and Firefox) but a couple of functions aren't working like they are missing.

I've tried to build with and without script compession and I made sure that it has nothing to do with browser cache.

I also tried a local server (XAMPP) and two real server.

One is available here:

https://dadracodesign.de/projects/margarini/

What you see is that the timeline in the upper left isn't working. As I said it works in preview and the export also works from file system in Firefox.

What other options do I have?

Hints are very welcome!

Ok, I've found it!

Very simple failure.

I use AJAX requests to load an XML files. One of the was set to "load from URL" and not from "project files".

Did make any change on the file system but of course on a real server.

So the issue should be solved.