Issue
You are unable to sign into Blackboard. All other Hamilton sign ins (email, My Hamilton, etc.) work fine. Upon signing in, you are presented with this or similar error:

Resolution
This is highly likely to be a session error/timeout in the browser. To resolve, either purge the web browser's cache and cookies or open the site in a private/incognito browser tab or window.
More information
If you need additional Blackboard support beyond that, email blackboard@hamilton.edu.