smartThings App cannot add “My Test Device”

I am performing a self-test of smartThings compatible zigbee devices, but I cannot add “My Test Device” to the smartThings App, and it keeps reminding me that I need to update the App.
smartThings Hub model is IM6001-V3P01

Hello, @Madi.
Which kind of project (in the Developer Workspace) are you using to integrate your Zigbee device?