when i look at source with firefox direct: there is also vision-map-1 style display:none!
when i take the firefow developtool there is vision-map-1 style display:block!
At least the log should contain the following line – VISION 1.5.1. i.e. the version of the plugin. If not, it means that loader.min.js ([wordpress]/wp-content/[plugin]/assets/js/loader.min.js) is not loaded for some reason.