Where is the filter gallery gone on Photoshop CC?

Hi Everyone

I went to open Filter Gallery and its not there - the option to click on it is there, but when I click on it, i just get a black screen with some boxes (as if its not opening correctly) but the rest of Photoshop works fine. I've attached screenshots so you can see what I mean.  I'm on a Mac Book Pro (2016) and just updated to Big Sur.  Any ideas what i'm doing wrong? TIA