That suggests they all personally thought it was a red, but only 2 out 5 thought a yellow was a clear and obvious error
He didn't get a yellow for the elbow, he got a yellow in the 88th minute for shoving Vieira in the face.
So actually 2 of the 5 thought giving him nothing for purposely elbowing an opponent in the back of the head was not a clear and obvious error.
https://preview.redd.it/rdhefx0f3l0c1.jpeg?width=1170&format=pjpg&auto=webp&s=34c3ac09858c97270be9f5d96e0130a3daff6a18