Can you please try to add file extension on your res:// path: get_node("/root/global").set_scene("res://Scenes/in_game_bot.EXTENSION")
(like .xml, .scn etc) and tell us if it helps? :)
You are sending file path (from "res://" space), not node path.
Example: get_node("/root/global").set_scene("res://Scenes/in_game_bot.scn")
Btw, i think you was going thru this tutorial on changing scene. That guy is using get_node("/root/globals").set_scene("res://Scenes/game.scn")
- first is node path, second file path.