More information about this error
Completing a Champion mission in the World of Warcraft Companion App did not grant credit or reward in-game.
App gives update error, but no update available in the store.
Information on the World of Warcraft: Companion App
Information about how the Animal Companion talent works for Beast Mastery hunters in World of Warcraft
Information about Battle for Azeroth command table troops created after 9.1 not registering abilities for missions
Unable to add a companion to the collection
Information about locating battle and companion pets
What to do if you can't open the Battle.net desktop app, and there are no error messages when you try.
What to do if a Companion is stuck and cannot be retrieved or sent out to do new Adventures at your Command table