If your DataHub on the NMEA GPS status page shows VOID, yet all the information populates, it may be confusing why it isn't working correctly and won't update your tracking position.
Check the Date and if the Year is old.
The above example shows 2004. This indicates a GPS device connected to the NMEA 2000 network providing the GPS feed is stuck in the last epoch time and the GPS device providing the GPS feed requires a Firmware update.
You may have multiple GPS sources connected to the boat, so you must carefully check each one to see which needs the update.
Please do this and then check this NMEA GPS status page again.
If you cannot remove the GPS stuck in the last epoch time from your system, please review DataHub - how to use NMEA2000 / N2K filters to enable this and select the best GPS from which your DataHub can receive data.