Waypoints not working in unreal engine using MATLAB & Simulink and Design Scenario reader

Hi, I have been attempting to add waypoints using design scenario reader in MATLAB 2020b, to co simulate in unreal engine using the 3d scene configuration block. The map imported into the scenario reader and Unreal engine 4.23 was created in Road Runner and the map loads in UE4 and in the design scenario reader. However, when i run the simulink model and press play in the unreal engine editor, I get an error as below. Any help is much appreciated.