From the E-bike Challenge website:

After careful consideration and due to circumstances beyond our control, E-bike Challenge Minneapolis has postponed this year’s event until October 17-18, 2020.

We know our attendees come to personally test ride new electric assist bikes, gain information and advice from industry and other e-bike experts, and buy e-bikes while at the expo. However, due to a number of suppliers unable to travel at this time, the decision has been made to reschedule our Minneapolis event.

At Hicle and the E-bike Challenge we believe Minneapolis will be the Cycling City of the Future in the United States.
That’s why we are committed to October 17-18, Hall E, for our rescheduled E-bike Challenge Minneapolis.

We regret any inconvenience this may cause and sincerely hope that everyone committed to our original date will join us in October. Your ticket will be valid for our event in October, but if you are unable to attend you can apply for a refund.
We will process this as soon as possible. If you have any remaining questions, please email our team at info@ebikechallenge.com