HTML edits not displaying

I’m a newbie blogger, so my html skills are practically zilch. But I have been successfully using the plugin to create a map.
For a while all my edits were displaying when I clicked on ‘Preview’ (like making most of the map inactive, and then activating a few countries, changing colors, etc.).
But now that I am trying to add an image to my map, I can’t see the map at all in ‘Preview’ after trying to make my edits.
I’m trying to add an image to Sydney, Australia. Here is my code (I copied and pasted your example from the tutorial):

var dataProvider = {
map: “worldLow”,
images:[{latitude:-33.873651, longitude:151.2068896, type:”circle”, color:”#6c00ff”}]
};

I can’t seem to find anything wrong with it (but I’m no expert). Why might it not be showing up? I inserted the code right after

https://www.ads-software.com/plugins/amcharts-charts-and-maps/