You may experience this problem for a number of reasons. Make sure you have carefully followed the instructions for starting a ride. If the bike still does not start, contact customer service at support@tier.app or by phone:
For the Netherlands 020 532 1766
For Belgium +32 2 586 22 20
Something goes wrong in the Gaiyo app? Please email support@gaiyo.com or call during office hours to: 085-2500595