Help with error message "Overwriting the same path as another open scene is not allowed"

I am trying to restart a scene with a certain trigger. I've made sure that the trigger is only being called once. When using Scene Manager to load the current scene again, or load a new scene, a scene is added to the hierarchy with the message "is loading" next to it in parenthesis as seen here. At that point I get the error message Overwriting the same path as another open scene is not allowed. The Scene Manager code that is causing the error can be seen here. This happens not only when trying to load the same scene, but also different scenes. This error prevents me from saving any changes to the scene. All I'm trying to do is switch between two scenes and reload the current scene. I've read the documentation and a lot of other post about switching scenes and this seems to be the proper way to do it. Any idea why I'm getting this error.