I have tried reinstalling OWIN, and I tried changing the web.config directly but I am still getting the errors I showed in the screenshots. This all happened after I tried to update a nuget package...
It wont compile anymore because of this.
you can see two entries for Microsoft.Owin.Security.Cookies.
I tried turning off the auto-generation for them and manually setting it but it still doesnt work. Is there a cache somewhere I can delete to fix this or something?