Lets get methodical: Try the MK IPilot app on your cell phone - does it work? This will immediately narrow down the issue. If motor works with your cell App, the remote is the prob (uninstall/reinstall batteries to reboot it and try again).
If you get no connection using cell phone as well, issue is the motor. Reboot it by turning trolling motor breaker off, or disconnecting the plug if it uses one, then turn it back on/plug it in.. If you have no plug or breaker switch to momentarily shut off power to the TM, or a thermal-only breaker, you'll have to carefully disconnect the TM power cable at the breaker, TM side, wait 5-10 seconds. Then reconnect, and try motor again. That's what I would do, anyway.