Hi Denis,
Try adding 3 ground springs with spring with properties of almost 0 like 1 or .01 to the thru hole in the part that has the 4 fingers that you are apply the load to.
Right now it's not able to define the initial location/state of the part on the left (is it touching the shaft or is it centered around the shaft).
Once the ground springs are added it should solve with no issues.
Hope this helps,
Don Anderson