Cannot open other scenes in Third Person Shooter Demo

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1

Godot Version

4.2.1

Question

I am trying out GitHub - godotengine/tps-demo: Godot Third Person Shooter with high quality assets and lighting and I could play the demo fine, but I can’t access any other scene files:

image
image837×361 107 KB

 Failed to instantiate scene state of "res://enemies/red_robot/red_robot.tscn", node count is 0. Make sure the PackedScene resource is valid.
--- Debugging process stopped ---
  Failed to instantiate scene state of "res://enemies/red_robot/red_robot.tscn", node count is 0. Make sure the PackedScene resource is valid.
  editor/editor_data.cpp:880 - Index p_idx = 1 is out of bounds (edited_scene.size() = 1).
  editor/editor_data.cpp:880 - Index p_idx = 1 is out of bounds (edited_scene.size() = 1).
  editor/editor_data.cpp:880 - Index p_idx = 1 is out of bounds (edited_scene.size() = 1).
  editor/editor_data.cpp:683 - Index p_idx = 1 is out of bounds (edited_scene.size() = 1).
  editor/editor_data.cpp:745 - Index p_idx = 1 is out of bounds (edited_scene.size() = 1).
  Failed to instantiate scene state of "res://enemies/red_robot/red_robot.tscn", node count is 0. Make sure the PackedScene resource is valid.
  Failed to instantiate scene state of "res://enemies/red_robot/red_robot.tscn", node count is 0. Make sure the PackedScene resource is valid.
  Failed to load scene dependency: "res://enemies/red_robot/red_robot.tscn". Make sure the required scene is valid.
  Failed to instantiate scene state of "res://enemies/red_robot/red_robot.tscn", node count is 0. Make sure the PackedScene resource is valid.
  Failed to load scene dependency: "res://enemies/red_robot/red_robot.tscn". Make sure the required scene is valid.

What could possibly go wrong here?