Lens Blur doesn't work in lightrooom 9.0

[tenconi]

Hello, i'm trying to apply "lens blur" effect but for some reason it doesn't work.

Im'm working in Lightroom 9.0 with format *.NEF, my driver are already updated and i don't know what to do because when i apply this never display any error or something similar. Have someone an idea of what could be??

Thanks in advance

[GoldingD]

I suspect, that you are using Lightroom Desktop (Lr), not Lightroom Classic (LrC), and that your post should have been placed at: 

Lightroom ecosystem (Cloud-based) Lightroom ecosystem (Cloud-based)

A moderator or Admin will probably notice this and move your posting.

[Aleke]

Hi @tenconi, welcome to the community!
Could you share a few more details about the issue? Does it happen with every photo? Are you on Windows or Mac? If possible, a screenshot showing what happens when you try to use Lens Blur with all Lightroom panels visible would be super helpful.
It would also help to see your System Info. You can find it in Lightroom under Help > System Info. Just copy the info into a text file and attach it to your response, or share it via Google Drive, WeTransfer, or any file-sharing platform you prefer.
Thanks so much!
Alek