Knocking noise in robovac 11

My eufy is making a knocking noise during operation. I removed the brushes and still get the knocking. Can anyone help me?

I don’t have the robovac, but when I’ve heard knocking noises in other vacuumes it has been because the roller was loose. If so, as far as I know there is not really a way to fix it. You may want to contact anker/eufy about this issue

If you have checked and removed all brushes,
cleaned all properly ,
it could be a defective gear wheel.

You should produce a video WITH sound.
and send it to the support:

Or go for a life chat.