Thanks for the report.
This mod is very strange... Instead of directly creating a hidden surface they're using a planet definition to create a surface? I don't see anything in their code that makes that make sense but here we are I guess.
I've updated the mod so it properly checks for a valid sprite before adding planets to the list, and there is now also a blacklist in the startup settings so you can manually mark planets like quality-condenser to be ignored.
Thanks again, and let me know if you encounter any other issues!