The Volume RAID 1 degraded

My Cloud OS 3 Personal & Network Attached Storage My Cloud EX2
1

I just bought a new My cloud EX2 Ultra 16TB. I just installed the light for drive 1 red and I got msg (th volume Raid 1 Degraded.

please help

2

https://support-en.wd.com/app/answers/detail/a_id/1161
https://support-en.wd.com/app/answers/detail/a_id/24586