GPU Lightmass not working on Landscape

[hieblertom]

Hi, Jimbohalo10 here is the link to my Projectfile. I am on Win10 with a RTX3090 and the latest driver. Thanks for looking into

https://drive.google.com/drive/folders/1LMpnf6zcRbOrX9oKSpQlcdKGD0OrUqv4?usp=sharing