We've had several users reporting that they can login to Grosh inside the Pebble Time app, but the watch app just keeps reporting that it's trying to connect. This could happen if you've used percentage sign in your password, so please don't do that for the moment. Here's some other steps that could also fix this:
1. Update the Pebble firmware
2. Reinstall the Grosh watch app (in the Pebble app)
3. Update the Pebble app