bbPress.org

i had the same issue, but it turned out that bbpress had not written any of the key info to bb-config.php, despite me specifying this on installation. i added this manually and it worked:

define(‘BB_AUTH_KEY’, ‘wp-auth-key’);

define(‘BB_SECURE_AUTH_KEY’, ‘wp-secure-auth-key’);

define(‘BB_LOGGED_IN_KEY’, ‘wp-logged-in-key’);

define(‘BB_NONCE_KEY’, ‘wp-nonce-key’);

define(‘BB_SECRET_KEY’, ‘wp-secret-key’);

define(‘BB_AUTH_SALT’, ‘(wp-auth-salt’);

define(‘BB_LOGGED_IN_SALT’, ‘wp-logged-in-salt’);

the first four are in wp-config.php and the second two are in the options page of the wordpress admin menus.