Asp.net.Identity with identityserver3 and Mysql

I am building a Identityserver3 with AspNet.Identity and MySql database.
I have build the identityserver stand alone, and it worked. Then I build the AspNet.Identity with Mysql and it worked.
Now I am trying to join them together but I got a weird error during login:

Could not load type 'CultureAwaiter`1' from assembly 'Microsoft.AspNet.Identity.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

The nuget package Microsoft.AspNet.Identity.Core is version 2.2.1 . I opened the cproj file and changed the version manually, but still I get this error.