Try plugging in your Edge 830 and using Garmin Express to remove & then perform a fresh install of the XSS Buckets data field. Also be sure to set your user/pass after re-installing.
If you’re still having troubles, reach out to our support team via email.
I think I’ve tracked this down to happening when my Edge isn’t updated with the current vetsion of the app. Connecting the Connect IQ store to the Edge and pushing updates seems to resolve the issue.