Nest and Dome Handler fails in the new Smartthings app

I am trying to use the new smartthings app which has a better UX design. However all my customized handler, including Dome Motion Sensor and Nest fails.
It always shows “Connecting” and when I press these devices it says "Cannot connect to this device"
Anyone has an idea how to fix this?

Many thanks!

Samsung has stated to NOT CHANGE to the new app if you are a current customer. Not everything is ready. There are several threads on here that discuss this.

The way to fix this is to wait until they tell you to switch.