disappearing/reappearing on video?

I am using a MacBook Air laptop for zoom meetings. At some point in the last month I chose a blue background for video, that now I cannot get rid of... I can cover it with another background, but nowhere in the video settings for zoom can I eliminate this blue background.\

The problem is, since I put it up, now my face and body or parts of me disappear and reappear when in a zoom meeting.

Can anyone help me to eliminate this issue? Like I said, there is nothing in the normal video settings that works.

Thank you!