Trying to recreate portal effect, have problems with projecting the view

Hello, I’m trying to recreate portal effect by following this tutorial: UE4 Tutorial: How To Build A Seamless Unreal Portal Door - YouTube. But I have a bit of a problem doing that. I have a feeling that it has something to do with engine versions differences, some things might have changed, not sure. I’m trying to wrap my head around it but can’t understand what the problem is. Thanks!