Cannot denoise

Hi @Marcus_Lau9537 ,

I understand how frustrating this situation must be for you. If you could share a bit more information, it would really help us assist you better. Could you please provide the system info from the LR help menu (Lightroom > Help > system info, and copy paste the text here)? Also, is this issue happening with all images or just a specific one?

We are here to support you and just need a little more information to get started.

Regards,

Srishti