Hello Mito,
I opened your model and deleted all the objects that were not essential. What you are left with is a Y and Z spring to ground at each bearing. That takes away 4 DOF. The X displacement and X rotation on one vertex takes away 2 more DOF to fully constrain the 6 DOF needed for a Static Solution. Ignore the warning that "Not enough constraints appear to be applied..." becuase it is not true.
You are navigating away from the AIS Discovery experience