Lay Theme Forum

I've updated the theme and several plugins. My front page is now set to a project page. I've disabled and enabled every plugin with no result.
In customizer the front page is set right, but it doesn't work. The front page has the permalink officina-arcana.de/ but shows officina-arcana.de/ringelnatz . The front page should be the site officina-arcana.de/hereinspaziert
I tried changing the permalinks, but it doesn't work. What else can I do?