HDR disabling custom post process

Hey guys!
I'm having a issue where, when I enable HDR in my camera the outline effect, created by following the steps from the link below, it stops rendering.

Without HDR:


With HDR:


I also receive the error "GL.End requires material.SetPass before!"

The code I'm using is from this page: https://willweissman.wordpress.com/tutorials/shaders/unity-shaderlab-object-outlines/

 

Try to move your effect on top of the Post Processing Stack in inspector

 

I tried, but it flips the Y axis of the view

 

Change y axis scale of the camera to -1