Map fails to load in front end

Map fails to load, grey background shown. Works fine on back end. Code inspector reveals JS error here:

XML Parser could not be instantiated

Which traces back here:

// Convert text to XML DOM
  text2xml: function(str) {
   // NOTE: I'd like to use jQuery for this, but jQuery makes all tags uppercase
   //return $(xml)[0];
   var out;
   try{
    var xml = (jQuery.browser.msie)?new ActiveXObject("Microsoft.XMLDOM"):new DOMParser();
    xml.async = false;
 }catch(e){ throw new Error("XML Parser could not be instantiated") };
   try{
    if(jQuery.browser.msie) out = (xml.loadXML(str))?xml:false;
    else out = xml.parseFromString(str, "text/xml");
   }catch(e){ throw new Error("Error parsing XML string") };
   return out;
  }

…but I can’t figure out why. Anyone have a suggestion?

https://www.ads-software.com/plugins/easy2map/