Make sure the 2.54mm jumper is installed prior to applying power to the board.
Make sure that your battery has been through a complete charging cycle.
Connecting a Power Source to the Motor Hat
Upon power up the Motor-Hat will advertise for 30 seconds inadvertent of pushing the pairing button. You can avoid opening the Top Cover assembly by simply toggling the power switch on/off and the Motor-Hat will show up again in your browser for pairing.