Landscape Grass Type in Material Crashing Editor?

Hey guys, just wondering if anyone can help me with this as it’s driving me crazy! So I’ve applied a new material to my landscape, and it keeps causing an editor crash with the following error:

`Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 691] Array index out of bounds: 0 from an array of size 0

UnrealEditor_Landscape`

Now I think this means that inside my material there’s an array that’s trying to access something that has an array index that doesn’t exist. I’ve debugged the material as much as I can and found that it’s only crashing when I have my grass type setup. I can’t seem to find any issues inside of them but I must be missing something here as this is definitely the cause.

I’ve adding the screenshots of the material setup and grass type setups, with a video of the the crash at hand, hopefully someone here can help me as this has been an absolute nightmare.





Does anyone have any insights on what might be the problem here?