Dont forget 4.9 got a major blendables / PP overhaul and just like c++ API stuff becomes depreciated, sometime blueprint and editor stuff needs to be changed with a new version.
So your desired result is the brown border around the screen?
What jacky is sayig is to go into the material editor for the materrial youir using and replace SceneTexture nodes with PostProcessInput nodes.
A pic of your setup and what your trying to acheive would help if that doesnt fix it, it sounded like you wanted to highlight meshes that are select/have the cursor over them?
Don’t forget to accept an answer that best clears your question up or answers it so when the community finds your question in the future via search/google they know exactly what you did to fix it/get it going.