ups…
It should read: I hope I could help
Many thanks to Devin Price !!!
welsh 6, I made it like Devin Price recommended. The original theme worked. In my child-theme I had previously created a Styckyfooter and the content and the footer assigned a position. Now I have content-position-relative and absolute-footer-position and everything is back in its place.
I hope I could helefen.
Greetings from Germany