Tizen SDK 2.3.0beta ( Wearable) after the second Building project – in the remote device you will see  a black screen after you have install and play  your app . Perhaps the problem is similar on that https://developer.tizen.org/forums/web-application-development/gear-2-web-app-black-on-black-on-device-fine-on-simulator?langredirect=1 .

But how to uncheck Tizen Web UI Framework library on the target device, and where – it is not clear for Tizen SDK 2.3.0beta .
  If you  have bild your project a second time –Tizen SDK 2.3.0beta will be show errors ( yellow signs) and black screen on remote device.
   In version Tizen 1.0 for Wearable – there is a no black screen and no errors.