Paper 2d Post Processing not working?

I am having some trouble getting Post Processing to work in my Paper 2d project. The problem is I simply can not get it to work. I am using 4.11.2, though I have tried it in 4.12.5 and it still does not work. I have been able to implement post processing in other template types and it works fine.

In my research I have only found this post but the question is not answered.

I am not sure what is preventing me from using post processing but any help or direction would be greatly appreciated.

I managed to fix this issue by accident. I am not sure how/why it is working now but it is.