"Lens Required" when doing command "module load cameraview"

I have installed mavproxy and all necessary packages, including cuav in ubuntu 18.04.
After connecting to board and doing command "module load cameraview" I receive error "Lens Required".

Start by reproducing the `module load cameraview` command after connecting to the board in the reported Ubuntu 18.04 and cuav setup. Trace the MAVProxy cameraview module to identify why it reports “Lens Required”; done means the cause is fixed and the command loads successfully, or the required setup is documented.

Written by the indexing model from the issue text.