causes error Failed to parse recipe pneumaticcraft:block_heat_properties/quark/brimstone[pneumaticcraft:heat_properties]: com.google.gson.JsonSyntaxException: unknown block id: quark:brimstone

Looks like Brimstone is no longer a thing in Quark. The error is harmless but will be fixed in next release.

thank you

Fixed in current 1.18/1.19 releases