I inspected your site using Chrome Developer tools and you have an error that is pointing to your issue. The first error message “you have included Google Maps API multiple times” indicates you have another plugin also trying to Load Google MAPS API and this is going to cause a conflict and break your MAP.
Viewing the directory under your WP Plugins you have Store Locator Plus (us, it is storel-locator-le) installed and you also have WP-store locator installed. Both of these plugins load maps and locations amd are fighting with each other. You cannot use both at the same time. You need to decide which plugin you wish to use and deactivate and delete the other. I have attached a screenshot
Your error messages”
js?sensor=false&ver=4.5.2:92 You have included the Google Maps API multiple times on this page. This may cause unexpected errors.Og @ js?sensor=false&ver=4.5.2:92
jquery.js?ver=1.12.3:4 Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help, check https://xhr.spec.whatwg.org/.