Miele dishwasher leaks (F70 error) only when the drip tray is attached

Miele dishwasher leaks (F70 error) only when the drip tray is attached

Help. I’ve replaced 2 x door seals and the circulation pump seal on my Miele Futura Classic G4286SCVi dishwasher. The circ pump seal had a hole in it and needed replacement.