When I log into Jenkins it seems to be ok, but after browsing around for a bit, I start to get exceptions. I've attached the Jenkins log, and the web browser stack trace.
I do have a AD group and 3 AD users configured as admins in Jenkins, but they are not AD admins. I can login successfully, and I check the "remember me on this computer" button on the login. Once I get the error 500, I have to clear the browser cookie to be able to see Jenkins again.
This was working with Jenkins 1.430 and AD Plugin 1.19
Reverting back to AD plugin 1.19 but keeping Jenkins 1.437 seems to resolve the issue.