No valid game data mod organizer

GamebryoBase? I know that's the engine that Skyrim is built on, but why would a mod installer be looking for that?

Since it hasn't been mentioned yet, or is unclear, could you clear up a question or two for me?

1) I know that MO is used for both MO1 and MO2 here, but I think it may be a good idea to clarify which version you are using.

2) Likewise, which version of Skyrim.

3) If Skyrim SE, is that mod a port to the SE version that is supposed to work, or a LE mod that is still unported?

4) You mentioned that this is a FOMOD based install (normally). Have you successfully installed any other FOMOD based mods at all?

I don't know what GSD is thinking, but right now, I'm wondering if the mod itself might be the problem, so I'd also recommend looking at the mod's Nexus page comments and see if others are having problems with install as well. If not, we'll look at other areas.