Hub connect home pro ET-WV530. Wifi working, but SmartThings Hub is not getting enable with error 'Can't register hib. Hib already in use'

using this for years. I factory reset it, manage to add it on smartthings app, wifi hub part working. But on clicking Smartthings Hub button to enable it , it gives error ‘Can’t register hib. Hib already in use’.

You will need to contact ST support. in the app, tap on Menu and select Contact us.