Usually I’ll create a shortcut to the executable, right click the shortcut and go to properties. Under properties, shortcut tab there is a target path that should end with \UE4Editor.exe". Just add -log after the path so it’s \UE4Editor.exe" -log and it will log what’s going on. At least that’s what I’m used to with UE4 dedicated servers. Sometimes the shaders take a while to build the first time opening UE4.