I've noticed a bunch of errors from FreeIva about not being able to find depth masks for some of the stock parts. I think it's happening when KSA or DE_IVA is installed and their INTERNAL nodes don't reference the depth mask models, but that's just a guess. If that's the case, then it might be appropriate to fix this in those mods instead.

fixed in RPM: FirstPersonKSP/RasterPropMonitor@7771d94
DE_IVA seems fine
KSA seems fine