Please ensure you have exactly one event system in the scene.

There are 2 event systems in the scene. Please ensure there is always exactly one event system in the scene
UnityEngine.EventSystems.EventSystem:Update () (at C:/Program Files/Unity/Hub/Editor/2020.3.0f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:398)

I have these two errors about 2 audio listeners and 2 events in the scene. They are causing my scenes to be combined when press a button in game mode. How do i fix them?

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What do you mean exactly by this sentence:

Do you have 2 scenes open, each with their own eventsystem and audio listener? If so, don’t do that.

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This is what i mean by the sentence, “They are causing my scenes to be combined when press a button in game mode.”

When i click on the play button or game instructions button, the scenes mix up as shown in the screenshot.

I open one scene open at a time. I do have scripts on the buttons that take me to different scenes

Ok so you’re doing additive scene loading.

You need to make sure when you load multiple scenes at once that both scenes don’t have audio listeners, cameras, and event systems in them, or that you destroy/disable all but one.

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Thank you so much, it helped a lot.

Thanks mate ! really helped

when i added a camera button in the scene after it the error came there should be only one event system in the scene