I have had a MiKTeX installation on this computer for several years and it has worked mostly smoothly. However, since today, when trying to install new packages using the package manager I get the following error:
MiKTeX Problem Report Message: Unsupported protocol Data: Source: Libraries\MiKTeX\PackageManager\CurlWebSession.cpp Line: 402 MiKTeX: 2.9 OS: Microsoft Windows 7 Business Edition, 64-bit Service Pack 1 (build 7601) Invokers: non-existing/explorer SystemAdmin: no PowerUser: no Root0: C:\Users\JonasAdler\AppData\Roaming\MiKTeX\2.9 Root1: C:\Users\JonasAdler\AppData\Local\MiKTeX\2.9 Root2: C:\ProgramData\MiKTeX\2.9 Root3: E:\Program Files (x86)\MiKTeX 2.9 UserInstall: C:\Users\JonasAdler\AppData\Roaming\MiKTeX\2.9 UserConfig: C:\Users\JonasAdler\AppData\Roaming\MiKTeX\2.9 UserData: C:\Users\JonasAdler\AppData\Local\MiKTeX\2.9 CommonInstall: E:\Program Files (x86)\MiKTeX 2.9 CommonConfig: C:\ProgramData\MiKTeX\2.9 CommonData: C:\ProgramData\MiKTeX\2.9
I can still run MiKTeX as usual, i.e. build documents etc, but any attempt to install new packages gives this error message.
In addition, If i try to change my remote package repository, I get this very cryptic list of repositories:
I have, to the best of my knowledge, not changed anything with the MikTeX installation myself since the last time I successfully used MiKTeX.
Edit: I have now encountered this problem on 3 of my windows machines, including 2 with windows 7 and one with windows 10. They all get the exact same error message and were all working just a few days ago.