Error 403 apache ERR_CONNECTION_REFUSED

Hi all,
I just installed the lampp suit following the instructions on [Archlinux]. I admit, I cpoied much stuff into /src/http-Dir and deleted it again. Maybe this causes my error: Error 403 ERR_CONNECTION_REFUSED.
ls -al shows me that all files belong tp group root and user http.
ls -al …

drwxr-xr-x 4 root root 4096 6. Jun 2020 .
drwxr-xr-x 19 root root 4096 9. Mär 10:46 …

drwxr-xr-x 5 root http 4096 9. Mär 18:43 http

Could anybody give me a hint what I coud test or change?

Regards CJC