@Victor i updated. it should be fixed now

The game freaks out because the xpath has empty spaces, that's all I think. Reproducing it was just loading a game I guess, or using the dev quicktest.

Ok, I noticed that while the game is loading, the mod list is empty and there's only a single empty gray box, so I checked the about.xml, and found this:
<modIconPath IgnoreIfNoMatchingField="True">
Things/Building/Misc/RichSoilPump
</modIconPath>
Removing the empty spaces fixes the problem, it should be:
<modIconPath IgnoreIfNoMatchingField="True">Things/Building/Misc/RichSoilPump</modIconPath>

@Victor ive never seen anything like that in my play testing. could you point me how i could replicate that? what were you doing when the errors are triggered? could it be caused by another mod in that mod list?

This mod is generating errors after a dev quicktest:
https://gist.github.com/HugsLibRecordKeeper/28d7863f5c4f9ac003a17ea9e7b7c40a

this is a really good way of balancing making your own rich soil while fitting with rimworlds style and balance. thank you!

updated visuals. provided kindly by Hyou

This is fantastic!