The add ban trigger button works, but when completing the trigger form, it results in a page with the error, "Ban not found."
Thanks for the report ... Looks like its a simple fix in Managebans.controller.php in function action_edittrigger()
$ban_group = $this->_req->getQuery('bg', 'intval', 0);
$ban_id = $this->_req->getQuery('bi', 'intval', 0);
$ban_group = $this->_req->get('bg', 'intval', 0);
$ban_id = $this->_req->get('bi', 'intval', 0);
ETA: https://github.com/elkarte/Elkarte/issues/3306