Procedural Foliage Spawner - Unable to spawn bug fix

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

Fixes:

https://dev.epicgames.com/documentation/en-us/unreal-engine/procedural-foliage-tool-in-unreal-engine?application_version=5.0

Don’t use duplicate or copy-paste volume. Add and drop a new volume from content browser when you want to create a new PFS.