Error when reusing compositions with Adobe After Effects

Hi guys,
I was working on a video using Adobe After Effects on my Mac. I have been using nested compositions since I reuse compositions. However, I suddenly encountered this error (see screenshot below) while using one of my comp. I have checked preferences and switches but I still get the error. Can anyone help me fix the problem?

After Effects error: exception occurred while processing effect “Pixelate”.
(25 :: 0)
