3 good layers then no succesful print

Hello,
I have a new VCore 4 Idex and followed the Comissioning Guide, but I can not get a finished print. The first 3 Layers print beautiful. When the Infill pattern starts the Walls curl up and the infill is not printinting right. I tried changing to different filament, flow, checked if the rotation distance of the extruder was of, printed only with 30mm per second, fan speed from 0 to 100%, changed the Infill type and speed. I tried everything I can think of.
I started with the standard prusa slicer Profile without any success and changed values but it did not get better. The first 3 layers are perfect and print smooth. After those 3 layers the walls curl up, get this weird pattern and the infill is not printing properly.