Could not load UnityEngine.Texture2D - replacing world textures problem

[Kayrah]

Im trying to replace a bunch of world textures, but when I load the game I get:


Could not load UnityEngine.Texture2D at Things/Plant/Haygrass/ in any active mod or in base resources.

Problem, I dont even have that folder in my mod.

I also get:
Could not load UnityEngine.Texture2D at Things/Plant/TreePoplar/

I have that folder with 4 different images named "TreePoplarA.png" to "TreePoplarD.png"

when i start a world, it uses the Poplar textures, but one kind of tree is a purple X, as well as the haygrass is an X

any help?