Make Main Camera root of hierarchy?

I need some help, I'm trying to create convert main camera to XR rig, but I've been coming across this error

"Your Main Camera is not at the root of your hierarchy. We are unable to automatically convert your scene. Please see the documentation on how to upgrade your scene.
UnityEditor.GenericMenu:CatchMenu (object,string[],int)"

I've looked everywhere for an explanation with no success. Can someone help me?

 

Is your main camera the child of another object in the scene?

 

Note the difference between your title and the error message.

The error is not asking for the camera to be the root, i.e. have everything else as a child of it. It is asking for the main camera to be at the root, i.e. it is not a child of anything else, but there can still be other root level objects in the scene.

It's general computer science terminology. A "root" is something which does not have any parents. From there, I strongly recommend reading all of this section of the manual, but specifically the Scene and GameObject sub-sections.

 

Yes, I placed the main camera as the child of the an empty game object.

 

Yeah.. Do not do that. The error literally states to not do that
Sorry if I'm snarky; it's late here, lol.

 

That is literally the opposite of what you're supposed to do.

 

I'm having the same problem, as the main camara is childed to the player from google cardboard, which is childed to a capsule that has all the movement and rigid bodies etc. How can I make it root if it's it needs to be attached to the capsule?