Hello,
Using Visual Studio 2012, I right-click on SharePoint Connections in Server Explorer and select "Add Connection..." My SharePoint 2013 site is on the same machine, so I enter http://localhost. (I've also tried the actual machine name, http://sp2013dev.) The connection is created with the root site at the top and all the nodes underneath (ContentTypes, Features, etc.). Some of the nodes I can expand (e.g. List Templates expands to show different List Template types; Lists and Libraries expands to show Document Libraries and Lists). But then when I try to expand further, I get an error message that states the following:
Unable to retrieve information for this node, possibly because the node has been deleted or its connection disrupted. If the item exists in SharePoint, be sure it is accessible
I have not found any information about this error, and I've exhausted all attempts to permissions above what I've already created.