Camera reset by itself and unable to add siren to trigger

[kasnh]

Noticed today that one of my Arlo Pro 2 camera's LED battery indicator was on, it was set to off. I checked all my modes and that camera was gone. 

Also, I'm unable to add the siren to trigger in any mode. Add Device>Choose Siren>Clicking "Next" does nothing.

[jguerdat]

Reboot the base for starters.

[kasnh]

Did that before posting.

[jguerdat]

Remove the camera from Settings, My Devices and resync. You'll need to re-add it to any custom modes.

[kasnh]

@jguerdat Great! Now the camera won't sync to the base...

[jguerdat]

Have you rebooted the base and reset the camera by reinserting the battery? Are you only briefly pressing the base sync button and not holding it for 2 seconds? Details.