I started getting this error after I upgraded to PHP 8.1. It prevents login, so this is a problematic error. BBPress is trying to setup a new login object and in the process wants to destroy any existing login object. Because BBPress doesn’t actually have a __destruct method php8.1 throws an error. I commented out that block of code and everything seems to work correctly. Of course that is a temporary fix that will be overwritten as soon as the plugin is updated.
I don’t have Jetpack installed on this server so it is not the culprit.