Hi everyone!
I’m currently trying to get acquainted with new UE5 features such as Mass AI and State Trees, and got an interesting outcome.
I’ve created a Mass Entity Config data asset, added “State Tree” trait and … it doesn’t see my State Tree assets. (or even accept it by drag-n-drop)
Which is more funny, if I hit “Create State Tree” from the dropdown, it creates a new asset, sets it to the field and still doesn’t show it in the dropdown.
We have the exact same issue.
What is even weirder, if you remove the State Tree from the dropdown and then try to select it again, even the newly created one does not show up anymore… This system seems to be completely bugged and unusable.
My team and I were experiencing the same problem. In our case the issue ended up being pretty simple to solve once identified. When setting up the project a folder was named with illegal characters (parentheses in our case) that broke syntax. Unreal will not allow you to name an asset with these characters but that protection does not extend to new folders or renaming folders. We moved the same assets to a new, correctly named, folder and everything works fine. Hope this helps!