Lihtmass result error

Hey guys, I’ve encountered a problem I can;t resolve by myself and need some help.
Does anyone know what to do with it? I’ve had some instanced foliage but already deleted it. Didn’t help, I don;t even know where to start with it.

Do you code in C++ or Blueprints?

So the foliage was deleted, and now the engine throws the error even though those instances are deleted? Might need to restart engine, or try refreshing the editor viewport…