Engine crashes when deleting tree

So, I’m having a problem, if I have say 2 trees, and deleting one, its okay, but trying to delete the FINAL tree on the terrain will crash the engine, so I can have a million trees, but if I delete the final one, it’ll crash the engine.
How do I fix this, if anyone is having this problem.

I had exactly the same problem! One solution I found was to go in the terrain, in the tree tab and to remove the tree(s)
Hope it helps…
Good luck with your project!,