Hey @PH, how long are you charging the battery for? You will need to make sure you charge it for approximately 8 hours and then once it's been that long, put the batteries in and it should finish updating!
@PH Thank you for letting me know! If you haven't already, I would recommend reaching out to our support team here. They can do some further troubleshooting to see what needs to be done to address your concern. Please let us in the community know how it goes!