Error when trying to delete a sprint

[Sean Hannan]

I am the admin of a project and have the Manage Sprints permission assigned to my user login.  When trying to complete a sprint, we first get a message box saying 14 issues were done and then a message box saying  "Error bad request: request method denied".

I ave tried logging off and back on, I have elevated to temporary system admin access but this did not make a difference.  All tasks are showing in the right most column labelled done.  I thought I would try to just remove all items from the sprint but when trying to do so I get the same error and cannot remove items from the sprint.

Any ideas on how to resolve this issue ?