Camera AnimationClip must be marked as Legacy?

I have a camera and I want to make it play a cutscene/intro animation. I created an animation "CameraIntro" using the Animation window and added the animation to my camera's Animation component.

I also added a script in my main camera to play the intro animation:

 void IntroAnimation()
 {
     this.gameObject.animation.Play("CameraIntro");
 }

However, I keep getting

warning : The AnimationClip 'CameraIntro' used by the Animation component 'Main Camera' must be marked as Legacy.

error: The animation state CameraIntro could not be played because it couldn't be found!

I saw solutions involving the "Rig" panel, but I cannot find one for the camera. Help please.