My coworker and I cannot connect to the online extension gallery in visual studio. We both get a message that says "Cannot search for online extensions because an error occurred while trying to contact the server."
I used "devenv /log" and found this error in the log file (%APPDATA%\Roaming\Microsoft\VisualStudio\<version>\ActivityLog.xml):
Exception occurred when opening connection to ICategoryService2: The HTTP service located at http://visualstudiogallery.msdn.microsoft.com/services/Category2.svc is too busy. The remote server returned an error: (503) Server Unavailable
However, the service help page comes right up in my browser.
If I type something different in the search box, I get the following error instead:
"A connection to the server could not be established because the following error occurred: The server has returned invalid data. Please try again later."