This effect requires GPU acceleration

[courageous_hands5E96]

I have this issue from a long time . When trying to stack effects on one adjustment layer it always starts to show. I was avoiding it when it appeared the most of time.I already tried changing the renderer to the gpu acceleration one. 

I have a nvidia geforce gtx 1660 ti

[Ann Bens]

FAQ: Avoiding Warnings Using VR Effects - Adobe Support Community

[RobShultz]

Please give us other system specs