Thanks for this @kautuk_sahni 

This is because of lack of access to /libs/settings/cloudsettings/legacy/contexthub/geolocationProper fix would be to correctcom.adobe.granite.contexthub.impl.GoogleMapsSignatureServletHere, proper service user needs to be used and access need to be granted accordingly. Quick Fix: Provide anonymous ...

Here is a simplified AEM tech stack article:http://prashantonkar.blogspot.com/2018/07/aem-technology-stack.html