Website not showing content in Chrome

I developed my first threejs project with the help of visual studio code and the live server addon. Everything works fine so far.
Today I switched to a webserver, hosted on a synology NAS. The website works fine in Firefox on a windows OS and in Safari and Chrome on iOS. But it does not work on Chrome or Edge on a windows OS. The Console does not show any error. I can only see the html content from index.html.
What could be the problem?

I found the reason It was a stupid typo. :angry:
An end tag was missing. It’s a shame that the DevTools didn’t show me anything.