No owin.Environment item was found in the context - only on server

问题

I'm getting this error: No owin.Environment item was found in the context

I've seen a zillion posts telling me that I need <appSettings> <add key="owin:AppStartup" value="[AssemblyName].Startup, [AssemblyName]" /> </appSettings> but that does nothing for me.

I am running Identity 2.0 and all upgraded OWIN components.

Also, this runs fine locally, but when pushed to my VM, I get this error?

Seems like either a setting is off or something else needs to be installed. WebPI says I have .NET 4.5.1 installed.

Anyone know how to fix this?

回答1:

Bah! The server needed to be rebooted. I wasn't prompted to, so I figured I didn't need to. I did. Have I learned nothing from The IT Crowd!? ;)

回答2:

Do you have a OWIN server loaded into you app? Microsoft.Owin.Host.SystemWeb is the most common (right now):

http://www.nuget.org/packages/Microsoft.Owin.Host.SystemWeb/

来源：https://stackoverflow.com/questions/22650168/no-owin-environment-item-was-found-in-the-context-only-on-server