I only see audio sources on the game objects but no Audio listeners
how do I find where these are?
and I checked all gameobjects only have 1 audio source so how do I find where this error is?
You most likely have multiple cameras. Some camera components might be disabled, but the audio listener components are kept enabled. Go through all of your objects in scenes (children included) and look for a camera in them. There most likely will be an audio listener attached.
If you do not find any, maybe it is created by some script.
Usually you might have a camera on character’s prefab, this might be the case. If you spawn a character, do not forget to disable the camera and audio listener on the main camera in scene.