If you still haven’t found a solution try the Mesh properties:
1 expand the properties on the item with the pins attached.
2 expand Effects.
3 expand Puppet.
4 expand Mesh 1.
5 change triangles value to 200.
6 change expansion to 4.
Changing the triangles and expansion values was what solved it for me. If I put triangles back up to 300, I get the error. If I lower triangles the error goes away. If I didn’t adjust the expansion the mesh got a bit wonky and didn’t look right.