You'll need to sign out of the Mobile App and sign back in:
If you aren't seeing the data file you are expecting to see, try signing out of the Mobile App and signing back in. Also, make sure you are signing in using the same Quicken ID on both your desktop and mobile device.
If, having completed the troubleshooting steps outlined above, you continue to get an error message about syncing to the Quicken Cloud, then contact support directly.
Or you could post back in this thread for additional help or to let us know how you resolved the issue.