Google Can Not Be Loaded Properly On This Page/ Developer Mode Wtf?

Dear Ladies and Gentlemen,
I would like to use the Map @ / index.php? dispatch = companies.catalog to display the records I've pasted in the backend under Addons / Store Finder (Store Locator). I have inserted the valid API KEYS. Now when I call the page, the MAP only starts in Developer mode. Besides, the places are not on the map. I use MVE: 4.9.2.SP3. Here I am stuck. Would be great if someone could tow me with a note.
best regards