When importing heightmaps you can't use crustmaps and platemaps (and vice versa). Additionally, as per the heightmap import tooltip in Gleba: `Note that this feature can ONLY be used for climate generation.`
Why do you want to import crustmaps and platemaps when you already have a heightmap? You mentioned making it "work properly"? If the impression is that for heightmaps to work you need crustmaps and platemaps too, that's not the case. The workflows are either "no map imports" / "crustmap and/or platemap" / "heightmap". I may need to make some improvement to how these features are displayed and organized.