How to fix the grass map needs to be rebuild error?

Hello, I’m pretty new to unreal and I’ve been trying to figure out this error, it started to happen overtime of me working on this map and I’m not sure how to fix it.

At the top left of your screen you will see a few buttons like, File, Edit, Window, Tools, Build and a few more. You want to click the build button which will open a new ui just underneath it with a bunch of options Near the bottom under the landscape category you will see a option that says Build Grass Maps Only clicking that should fix your issue.


Really clear answer, thank you so much!!! :smile: