Problems with error “Exception has been thrown by the target of an invocation” when trying to connect to TFS / show team explorer window in Visual Studio 2013?
Solved by downloading and reinstalling Team Explorer 2013:
Download Team Explorer for Microsoft Visual Studio 2013 from Official Microsoft Download Center.
You can find more info on errors in Visual Studio 2013 in this logfile:
%userprofile%\AppData\Roaming\Microsoft\VisualStudio\12.0\ActivityLog.xml