Question Arm moving with motion of body with Animation Rigging package.

I am trying to animate just the arms to stay in a aiming position using the Animation Rigging package, but I am having this issue where when the player walks or makes any movement, the arms move out of place into strange positions. I have been attempting to fix this issue for hours with no luck. Please help me any way you can. All help is appreciated.

I would like to add that I am stuck with this error



In addition. I want to clarify that I am using a humanoid rig because I am using a thirdperson controller asset from the asset store that requires the use of a humanoid rig.

Provided below is a video showing the issue I am experiencing.
https://www.dropbox.com/s/c0gydl96681g4su/UnityIssue.mp4?dl=0