I can't seem to get the mh_workspace working. When I set it to "Initialize new MH Head" I either get:

Invalid source ./GROOMING/mh_groom_builder1/strands_generation_and_guide_clumping_multi/if_input_one_connected_switch3.
(Warning: Bad node reference: "1" in parameter ./GROOMING/mh_groom_builder1/strands_generation_and_guide_clumping_multi/if_input_one_connected_switch3/expr2.
Error: Invalid source ./GROOMING/mh_groom_builder1/strands_generation_and_guide_clumping_multi/guideinterpolationmesh1/post_remesh.
(Error: Invalid target edge length. Length must be greater than zero.).).
Unable to cook the test input.
Unable to cook the test input.

OR - it seems to work, but when I add a mh_groom_builder I get:

Invalid source ./strands_generation_and_guide_clumping_multi/if_input_one_connected_switch3.
(Warning: Bad node reference: "1" in parameter ./strands_generation_and_guide_clumping_multi/if_input_one_connected_switch3/expr2.
Error: Invalid source ./strands_generation_and_guide_clumping_multi/guideinterpolationmesh1/post_remesh.
(Error: Invalid target edge length. Length must be greater than zero.).).

I've checked and I'm running the latest version of the MH Groom tools in Houdini 21.0.512.

Any idea what's going on?

Paul