Fusion interface turn Black

Hi!
After 2 days that I'm using Resolve, the Fusion interface turn black....Any others interface work well but Fusion is totally black. I was working on Fusion (Inside Resolve 15.1) before it crashed and then turn black. Any ideas?
Davinci Resolve 15.1
Imac
OS Sierra
After 2 days that I'm using Resolve, the Fusion interface turn black....Any others interface work well but Fusion is totally black. I was working on Fusion (Inside Resolve 15.1) before it crashed and then turn black. Any ideas?
Davinci Resolve 15.1
Imac
OS Sierra