For anyone else out there trying this, this is how I got it to work.
-
Go to your Project Settings - Maps and Modes - Default Pawn Class - and set it to None.
-
Open your Third Person Character BP, go to the Viewport, Select the very top of your character - in the details panel search for auto - Look for Auto Possess Player (which should be disabled) and set it to “Player 0” per this suggestion.
-
Go to where your Third Person Character BP is and drag and drop it into the world, position and rotate as needed.