You may have encountered this Error Code if public access to an Activity
has been manually overridden by Bungie. This may occur if an issue has
been found, or if an activity have been taken offline prior to a Destiny
Update. Please follow @BungieHelp on Twitter for updates.
If there have been no announcements concerning this Error Code by @BungieHelp, please post a thread in the #Help forum detailing your experience.