@Vamachara The DirectX: SavetoFile failed error is the one I posted as the first error, you get that when trying to save. I can see you have that too....

So here is what I found...

1.) I created a copy of the level inside the same Project. Same issue. No fix

2.) I created a NEW project, added the troublesome project as a dependency and created a new level as a copy of inherited level. I removed the dependency after I made sure I could save the probe.

Now it works fine....I do NOT get the DirectX error and my light rendering gets saved in my new project.

So yeah, it seems to me that some DirectX files are making this fuss.