Both Connections and Comprehensive Google Map Plugin requires the use of the Google Maps API. The Comprehensive Google Map Plugin has a function which looks for other instances where the Google Maps API has been registered and if it finds one, it unregisters it. This will completely break templates [and any other plugin, actually] which require the Google Maps API because the Google Maps API is registered as a dependency. If the dependency does not exists, WordPress will not load any other script which depends on the missing dependency. There is a solution…
Install the Code Snippets plugin.
Add a new snippet using this:
Save and Activate the new snippet.
Now, both Connections, its template and the Comprehensive Google Map Plugin should play nicely together.
The only other option is to use another plugin. A user suggested Leaflet Maps Marker as an alternative to Comprehensive Google Map Plugin.
NOTE: This FAQ was written based on Comprehensive Google Map Plugin 9.0.20