Looking in the Inspector Console, I see the Google Maps error coming from the xtender plugin as well.
I cannot find that plugin anywhere. It is not listed on wordpress.org. When you go to Dashboard > Plugins, and click on “View Details”, or any other thing that might lead to where the plugin comes from, can you then see where it is coming from? There might be updates available, or if not, you might want to look out for an alternative.