Kami mini can’t connect after update

I have 3 Yi/Kami mini cameras. Since I updated the firmware as instructed yesterday, one of the cameras cannot connect. The other 2 are fine. Any suggestions?

Customer satisfaction is a priority for Kami Home and we provide 24/7 customer support to our users. We regret that you had an unpleasant experience. Please reach out to us at the email listed below so our customer support can help you out: