Cannot Add Range to Smartthings App (iOS user)

I recently bought a Samsung range to complete my home kitchen package, and found out about its support for the smart things app for iOS users. The frustrating thing for me is that I cannot successfully add my new range to the app, it just gets to 30% every time when I hit the smart control feature on the range, and then it freezes. My range model is NE58K9850WG and I have an iPhone X with Smartthings version 1.6.21-207, I assume this is the most up to date version/app. Any advice is greatly appreciated in advance!