Visual studio 2012 - locals have disappeared

Question

While debugging VS2012 I have found that I can no longer access variable values:

• The Locals window does not show anything (pictured below).
• The Watch

Answer 1

I've eventually managed to sort this out by myself - so I'll give my solution here in case anyone else has the same problem:

I found that in Tools->Options->Debugging->Symbols was pointing to an old NuGet symbol server. Somehow a wrong symbol server looked like it was taking down the entire Locals and Immediate Window systems.

Updating the symbol server fixed my problems.