It used to work with the classic app but I’ve never been able to get this to work with the new app. With the classic app being phased out you may want to put your efforts into something which works with the new app and kept up to date like lum from rboyapps. I was reluctant to shell out a few $ initially but it has been totally worth it. The support and the quality of their apps are excellent.
Smartthings seems to be constantly evolving so I can see the pressure on developers to keep their apps updated.