Try updating the unit first to do that, just go to your unit's IP on the browser, then go to settings or a shutdown icon look-alike on the top right under version just click the version.
Wait for it, if it shows a new version is available, don't close it, it will automatically update to the most recent version.

If it's already using the latest version, then you're other option is to try SD card flashing, the guide on how to flash the SD card can be found here https://www.futurebit.io/apollo-btc-support
Make sure to backup all files first from SD card before flashing it.

If my solution doesn't work try some solution from here https://bitcointalk.org/index.php?topic=5340015.msg57091053#msg57091053