No, You cannot delete admin user. Clarified in Docshttps://helpx.adobe.com/experience-manager/6-3/sites/administering/using/security.html

Seems like you are missing two things:1. resolverFactory.getResourceResolver(null); won't give you proper permissions[0]. Create a service user and then use it [1][0] https://sling.apache.org/apidocs/sling7/org/apache/sling/api/resource/ResourceResolverFactory.html#getResourceResolver-java.util.Map-...

Point 1- Use package manager in AEM and get those pages in from 6.1 to 6.2 instancehttps://helpx.adobe.com/experience-manager/6-3/sites/administering/using/package-manager.htmlI recommended option 2 so that you can register user via useradmin and don't have to use package manager for pages, config c...

AEM 6.3 onwards, these keys are stored in file system instead of being AEM Repository /etc/keys/hmacProper steps are documented for it herehttps://helpx.adobe.com/experience-manager/6-3/sites/administering/using/security-checklist.htmlhttps://helpx.adobe.com/experience-manager/6-3/sites/administerin...

Your question seems to be too generic.You might want to first see if the delay is happening at AEM (request.log will tell you) OR at the browser in client-side rendering (see browser console for network request and JS implementation)Thanks

1. Do you have the required permissions on stage? If not, try with admin2. For 500 error, you should be seeing something in error.log Thanks

HierarchyNodeInheritanceValueMap does not return the inherited value from parent node....but from the parent page. So it won't work in your case.If you have a structure likeParent - /content/pageA/jcr:content - key = valueChild - /content/pageA/pageB/jcr:contentIn this case, parent key will be inher...

AFAIK,Register option was removed from Geometrixx from 6.2 Onwards for reason due to deprecated API for the account manager.Though you can still make it work with few steps:1. Enable service in config2. Package register pages /content/geometrixx-media/en/toolbar/account/register from 6.1 to 6.23. Co...

Since js use API executes on the server and your javascript ajax will executes on the browser. You would need a way to pass these values to the front end so that javascript can read it.I would not encourage using script tags inside HTML, it blocks the page parsing. You either use custom data attribu...

I see you haven't mentioned the port number, in this case AEM will try to pick any of the default available ports.port number as follows: 4502, 8080, 8081, 8082, 8083, 8084, 8085, 8888, 9362, <random>Custom Standalone InstallHow are you trying to access the aem, can you share the URL?I would say for...