Having Same issue with washer. App picks up adapter. Asks for Ap name and password, I input that then says to wait but nothing. After like forever it finally tells me setup not complete, try again.
So I'm running Android P on my Google Pixel XL 2 and had the latest version installed as of June 10, 2018 and could not successfully add the Samsung Duo Oven in the Samsung Connect App. I downloaded an older version of the app and successfully added the oven. Below is the link to version I installed. After you successfully add the oven you can update to the newest version. Make sure to uninstall any other editinge before installing the older one.
I have same problem, only difference instead of Samsung I am using an Iphone.
I can not finish the install, it connects to the Wi-Fi, it reaches 42% completion than gets stuck.
location 10 feet to the wifi router, I do have other devices connected to Smartthings app.