Siren stopped working - network or server error occurred

My siren used to work just fine but suddenly stopped working. I tested the siren and it is loud and clear and works. When I get into SmartThings and it says Off and when I hit the power on icon to turn it on, it says network or server error occurred. How do I trace where the problem is - the board, the panel, the wiring? Everything had been working and so it is not clear that the panel and wiring would have suddenly gone bad.

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