Hi I had the same problem witha different theme. It seems the metabox plugin upsets the WP image tools. I’ve got around the problem by renaming cmb.js to cmb_.js. This will obviously break whatever cmb is supposed to do (I noticed I have to manually enter the start and end date rather than use the popup calendar), but its got things working.
cmb.js is located in /wp-content/plugins/ml-adverts/includes/metabox
