By default, the Dialogue System will create an EventSystem at start if one isn't present in the scene. However, some games instantiate their own EventSystem at runtime. In this case, you don't want the Dialogue System to create an EventSystem. To tell the Dialogue System to not create an EventSystem:
1. Inspect your dialogue UI. UNtick Add EventSystem If Needed:
- untickDialogueUIAddEventSystem.png (18.75 KiB) Viewed 3265 times
2. Inspect your quest log window. By default, the Dialogue Manager GameObject has an Instantiate Prefabs component that instantiates a quest log window:
- instantiatePrefabsQuestLog.png (32.1 KiB) Viewed 3265 times
If you don't plan to use a quest log window, or if you've already added an instance of your quest log window to the scene, you can remove it from the Instantiated Prefabs list.
Then UNtick the quest log window's Add EventSystem If Needed checkbox:
- untickQuestLogAddEventSystem.png (39.63 KiB) Viewed 3265 times