SIYI A8 Mini to Herelink V1.0 - No HDMI Video Signal (Solid Yellow LED1)

Hi, I am currently facing issues with the Herelink Radio Controller unit V1.0 and the Air Unit V1.0. I connected a SIYI A8 mini camera via micro-HDMI to the micro-HDMI port 1, which is the recommended port for the Herelink Air Unit V1.0. When I power on the setup, LED1 on the Air Unit shows solid yellow. According to the manual, solid yellow means it is receiving flight control (telemetry) data, but it is not receiving an HDMI 1 video signal. How to diagnose this issue because I also require it to stream video onto the Herelink controller unit in QGroundControl?

Below are the configurations that I have set up for the camera: