Unable to spawn instances. Ensure a large enough surface exists within the volume

I am trying to add procedural foliage and i have grass everywhere on my map, but when i paint my forest and setup my foliage volume with my forest spawner it says “ Unable to spawn instances. Ensure a large enough surface exists within the volume”

In my case this error was caused by the “Collision Presets” set to “No Collision”.

Changing it to “Custom”, “Query Only” and “Ignore” on all elements made it work again.

in UE_5.2\Engine\Source\Editor\FoliageEdit\Private\ProceduralFoliageEditorLibrary.cpp