This error indicates that device pairing failed. This may happen for a number of reasons with the most common cause due to instability in the network connection at a critical step in the process..
Please follow these instructions in order to resolve the issue:
1. Wait 2 minutes and then proceed to pair once again. This may allow enough time for pending requests to complete.
2. If the issue persists - reboot the computer and try to pair. This may ensure the computer did not reach an error state.
Why might I see error code 1420004 on the Workstation client when pairing my mobile device?