Unable to restore / remove / update a NuGet package because the mentioned version is no longer available

Question

I\'m trying to give the SignalR Sample a test drive but it seems it references an old version of SignalR which is no longer available. The actual problem is that NuGet cannot re

Answer 1

Mentioned by @ferarias in a comment - if you are using nuget.exe, try updating it or downloading the latest version.

For me, upgrading from v4.4.1 to v4.6.2 was enough to fix the Some NuGet packages are missing error.