Google Maps conflict with Post Grid

Hi there,
I am setting up a site and when we installed Post Grid (Pro version) (https://wordpress.org/plugins/post-grid/) the options for Post Grid didn't work properly - like on other sites we use it.
When I disabled Plugins one-by-one it was the Google Maps plugin that stops the Post Grid plugin from letting us set up a new layout.
Any help on a workaround would be much appreciated - need both plugins!
thanks
Andrew