Are you working in 8, 16, or 32-bit color?
Does changing that make the error stop appearing?
Are you still facing this problem? If not, let us know how you solved it. If so, please let us know so we can assist you further.
I am still getting this problem on 2017. I am working on footage that is 3800x1200 exrs. I am working in 32 bit.
Simple fx such as tint, levels, exposure, and blurs have this problem.
It is quite difficult to finish the job as such.