Using Version: 2.59.5135.781 64-bit (June 2018), I am not able to view a custom visual built using API version v1.13.0. Not sure what would cause this. Is v1.13.0 not officially supported? I had to upgrade to fix a bug with selection/highlighting. Please let me know if there is an update coming soon to resolve this, or if you need more info. Thank you!