Errors in fresh version:

photometric-lab-hr-animation-1 has wrong name in graphics directory

photometric-lab-hr-emission-1 has wrong name in graphics directory

Or you're calling them with wrong names :) I made copies with those names and it seems to work.

Update Muluna. The new version of Muluna graphics only works with the newest Muluna version.

I experienced this same problem. I was still using version 2.1.21 for compatibility with some other mods and didn't see the updates to Muluna at first. Perhaps set the version requirements for this release the same as Muluna's?

Oh yeah, sorry for the false flag! I didn't notice there was a new beta version. It seems to break quite a few mods with the temperature and fluid changes.