Our Van is push start. Today it wouldnt start. All of the lights lit up. Then tonight the liftgate came up on its own

 

welcome to the forum, remove and clean the terminals and the post, reinstall the terminals and try to restart. if still no start, jiggle the key in the ignition to see if it will start, if still no start (turn starter) tap lightly the starter with a brass hammer. if still no start, starter going bad.