Problem with Google Maps

Hi there.

I seem to have a strange problem with Google maps on my site http://www.vapedb.co.za

As you can see on the home page everything seems to be working alright:

However if you click on one of the marker clusters to zoom in, the map does not reload or refresh:

If I change the setting to use the Open Street Maps API things work as planned:

marker clicked:

I have tried installing the “API KEY for Google Maps” plugin but found no luck with this.

As part of my trouble shooting I installed the Custom Gooogle Maps plugin but this didnt do anything.

When looking at the console, I can see that there are errors relating to google maps but I am unsure how to diagnose and resolve the problem:

I look forward to your advice and guidance.

Josh