Same thing happened to me. There is no fix, but 2 work arounds.
You can turn off graphics acceleration. Go to Edit/preferences/performance and untick 'Use Graphics Processor'. Liquify should now work.
Unfortunately, when I turned off the graphic processor other things stopped working, eg there was no bounding box when I wanted to Transform an object and I had to do Ctrl+T then click somewhere on the object for the bounding box to appear so that I could alter the object 😕.
So I re-checked the 'Use Graphics Processor' box, but of course Liquify didn't work again. So now if I want to use Liquify I have to hold down the Alt key first. Go to Filter, hold down the Alt key, then click Liquify and it should work. I keep forgetting though!
This latest update has stuffed up all sorts of stuff for me and being as though I use Photoshop most days I'm not a happy bunny.
Try enabling this option in preferences
Also try setting the drawing mode to normal instead of advanced
Restart Photoshop for both of the above, the Liquify filter works fine for me with Windows 10, Photoshop version 22.4.3
Unfortunately didn't work for me Ged. Still getting a blank grey screen with a circle in when trying Liquify.
Try resetting your Photoshop preferences
If that doesn't help try using the Adobe cleaner tool
What are you computer system specs, in Photoshop go to Help > System Info, hit the copy button and paste the entire thing into this thread
Thaks to all for your suggestions!
Finally I did the following....
I uninstall version 22.4.3 and back to version 22.2
Then I went to Edit / Preferences / Performance / Advanced Adjustments ...and untick all the checkboxes
Now liquify is working again ...lets see what are the consequences
Thanks again for your time and tips