Exhausted all leads - Flow map not being applied to tiled landscape from Gaea

Hi guys, ive built a 6x6 (tiles) heightmap at 2017 resolution and brought it into Unreal. I finally got it to just import. I have applied my auto material, but when i import the flow and slope maps, nothing changes on the landscape itself.

I just see the grass material that is the base material. I have the layers for the slope and flow maps created. I’m just unsure of which settings to use in Unreal. I also don’t know 100% that everything is correct in Gaea.

I do get this error (below) when i try to import them.

In addition to asking for general help, I also need to know if just choosing one of the heightmaps is correct, so that Unreal auto lmatically uses the rest of them in the folder?

Below is the error and my current output settings in Gaea. I really hope somebody can help me solve this problem because I’ve tried everything i could find.

Thanks in advance guys