[Part 10] There can be only one active Event System warning

[Kiefer Neo]

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What the error tells you is that you currently have more than one Event System in your scene. You can type “t:EventSystem” into the Hierarchy search bar to show all the GameObjects with the component. Delete the extra one and the warning should no longer show.

[A_DONUT]

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This error message indicates that your Unity scene has more than one Event System component. The Event System is responsible for handling user input and dispatching events to UI elements like buttons, sliders, and text fields. Having multiple Event Systems can lead to unexpected behavior and conflicts. To resolve this issue, follow these steps:

• Find the Duplicate Event System:
  • Open the Hierarchy window in the Unity Editor.
  • In the search bar at the top, type “t:EventSystem”. This will filter the hierarchy to show only GameObjects with the Event System component.
  • You’ll likely see two or more GameObjects listed.
• Delete the Extra Event System:
  • Right-click on one of the extra Event System GameObjects and select “Delete”.
  • Important: Make sure you delete the extra Event System and not the one that is essential for your scene’s UI interactions.
• Save the Scene:
  • Save the scene to ensure the changes are persisted. After deleting the extra Event System, the warning message should disappear, and your UI elements should function correctly. Remember that a scene should ideally have only one Event System to avoid conflicts and ensure proper input handling.

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[Jhan Khendrick Perez]

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What confuses me on this part is that, my EventSystem is only on the Essentials and there is no EventSystem in any other scenes, however the EventSystem warning is always showing “There can be only one active Event System.” even though I have no EventSystem in any other scene

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