I have a solution with 3 projects, freshly downloaded from git repository. Each of the projects references a library from the nuget.org gallery - these are downloaded during the build process as expected.
The problem is that only in one project these libraries are correctly recognized. The other projects show on the Error List as warnings:
'The referenced component X could not be found.'
I checked - these libraries are on the disk.
When I uninstall and install (aka re-install) these packages - everything is OK! I have found similar issue here (ID 759434) - but this was in VS 2012 and should be resolved.