Actors doesn't want to spawn on a Landscape

I’ve tried having “NoCollisionFail” both on and off, but neither works. And since the squadon the block fails when it is close to the ground, but spawns if I rise the block up a bit.
Could it be any volume or something I’m missing?

And If I look at the Collision view


I can’t really see anything that would make it fail either

And the navemsh looks good.