Raspberry pi Multi-camera adatper board

Q1: more cameras gives the error:
mmal: mmal_vc_component_enable: failed to enable component: ENOSPC
mmal: camera component couldn’t be enabled
mmal: main: Failed to create camera component
mmal: Failed to run camera app. Please check for firmware updates

A1:
Step1:
Use a camera to test each channel individually to see if there is something wrong with the hardware.
Step2:
Power the raspberries with a large current power, otherwise multiple cameras can’t be fully charged
Step3:
Use a shorter cable to connect the raspberry pi camera and multi-camera switchboard to prevent the signal
crosstalk.
Q2: Why can’t multiple camera detect data?

A2:
You should remove some resistance.
For SPY camera:

For official camera: