Why is [Owin] throwing a null exception on new project?

Question

I have a rather strange issue i\'m not sure how to fix or if i can even fix it.

I\'ve done some research into the issue but can\'t find an answer to what\'s causing

Answer 1

These answers all seem helpful and to indicate a trend that the database is messed up. I got this issue because I had updated my model and hadn't updated the database. Right now I'm calling Add-Migration and Update-Database manually each time I change the model and before I try to debug my site and I had forgotten that step.