Years on and I’m getting the same issue, not sure what caused it, maybe after trying to enable nanite on my landscape which I disabled. I think if I could change the landscape’s rootcomponent to static it would fix it but the option is greyed out with a message saying that native components are editable when declared as a FProperty in C++, this is way over my head, as is the procedural grass system the level is using (It’s using the lookout tower asset from the marketplace).
Did anyone solve this?