Garmin track your activities and record your real-time location. You can directly access the data of your activities on your system through Garmin Express. Due to technical issues, this problem occurs i.e. Wi-Fi network failure. This also happened due to Garmin error code 0300 due to issues with the network itself. Technical Expert helped to fix Garmin Error Code 0300 . . Technical Expert helped to fix Garmin Error Code 0300