A new version was published.
Now it works again.

Solved.

@ninjabreadman
Thanks for the help.
I tried it again and found my mistake.

Like you said, the default is 4.5.
I testet small adjustment steps and then jumped to 0.
However 0 is not zero zoom. I am not sure what it is.
But it seems like I skipped the 1 which is no zoom.

With zoomLevel 1 it was easy to adjust the zoomLongitude and zoomLatitude.

Thank you!