When I receive an email notification they include unsubscribe buttons. Previously, when I clicked/tapped an unsubscribe button it would take me to the site and unsubscribe me from a specific topic. Now, I get an error message. See attached. This is a screenshot of what I see after clicking on an unsubscribe link in an email from someone I follow. Any ideas why this is happening and how to fix it? This only started with the latest major update of WPForo.