4 months ago - Ubi-Dastan - Direct link
Hi there,

Sorry for the delay in getting back to you.

The Authentication error mainly occurs if you are logged in with the incorrect Ubisoft account. You need to log in with the same account that you have originally used when activating the game on. You can read more on that in the article we have here - https://ubi.li/J15gv

If you do not remember the details that were used for, I would highly suggest contacting the support team over at the website so they can look into this further for you.

You can contact them here - https://ubi.li/F1Xay

Should you have any other queries, please let us know!

- Ubisoft Support