The problem here was: I did not create an efi boot partition. But the automatic installer did not create one as well nor complained about the missing partition. I installed manually and it works now.
But the automatic should give a hint at least.
The problem here was: I did not create an efi boot partition. But the automatic installer did not create one as well nor complained about the missing partition. I installed manually and it works now.
But the automatic should give a hint at least.