So, in Run 6, I have tried adding the elastic support on the top and bottom round faces of the coin at spring rates of x0 y0 and z1000 N/m. This still results in unconstrained error 
Then, I imported a new CAD geometry of a 10 degree sector and meshed it under this simulation, there are potential issues with the mesh as described in this topic…
I ran the Run 1 in that sim with the mesh of concern, but had to cancel the run after ~25 minutes at 4%
Have I constrained the plastic coin as you suggested 
Any ideas on why the simulations still fail