Are you getting an authentication error when trying to access your game content?
This error may appear when trying to load DLCs in Epic Games Store that were purchased from different stores like Steam or Microsoft store. Please note that Epic Games Store, Steam, and Microsoft Store are distinct platforms and they don’t share your user data, content, or purchased items.
Therefore, if you own Conan Exiles and additional content on different stores you can only access the content purchased in that specific account and store for that game session.
ex: If you own Conan Exiles base game on Epic Games and Isle of Siptah DLC on Steam you won’t be able to access Isle of Siptah on your Epic Games account. In order to play Isle of Siptah on that account, you will need to purchase and download it on the Epic Games Store.