A few weeks ago I used to be able to use the new 'remove reflections' tool, and it worked quite well. Recently it has just stopped working.

It tries briefly then gives me 2 errors:
"Unable to remove reflections. There was an unknown error."
And "The graphics processor has encountered an unrecoverable error. Due to a run-time error, GPU acceleration has been disabled for the remainder of the session."

It was a good tool before whatever changed in a recent update? Any help much appreciated.