My new Zigbee Device Handler shows "Checking status" in Smartthings App but working fine in Smartthings Classic

I am trying to add a new Zigbee Device handler for my zigbee device (A Zigbee Smartplug from my company).
I can see the device working properly in Smartthings Classic Mobile Apps. ( I can control and see the status of my Smartplug)

However, in Smartthings Mobile Apps, it just show “Checking Status” and I cannot check / control by device.

What is the possible issue in my device handler that should I look into.

Thanks in advance.


It requires the vid. See this for more details -

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That’s works done. Thanks.