Watch Dogs players experiencing problems logging in to Uplay (updated)

Watch Dogs' authentication servers are experiencing problems, leading to delays or unsuccessful log-ins for Uplay, according to a tweet from the game's official Twitter account.

We are experiencing issues with the authentication services. Players may experience long delays when trying to login in-game. More to come.

— Watch Dogs (@watchdogsgame) May 27, 2014

The problems appears to be affecting both console and Steam editions of the game. Unsuccessful log-ins resulted in the message "Sorry, Uplay is not currently available. Please try again later." The issue does not appear to be affecting all players, as some members of Polygon's staff were able to access Uplay with little to no problems.

When Uplay is functioning properly, it displays featured actions, Uplay rewards and achievements and more. It is also required for some of the game's multiplayer options. Although console owners can typically bypass the Uplay login, PC players are required to use it to register the game.

Watch Dogs launched today for PlayStation 3, PlayStation 4, Xbox 360, Xbox One and Windows PC. The Wii U edition of the game is expected later this year. For more on the game, check out our review, comparison of the PS4 and Xbox One versions or explainer on the game's history.

According to the game's Twitter account, "connection is rising and the issue still seems intermittent."

All the possible efforts are put into the resolution of this problem. We are currently monitoring the situation closely. (1/2)

— Watch Dogs (@watchdogsgame) May 27, 2014

The connection is rising and the issue still seems intermittent, the sign in system might work after several tries. (2/2)

— Watch Dogs (@watchdogsgame) May 27, 2014

Update: Ubisoft has released a statement on Twitter, saying that the situation is being addressed and is improving. "We're working to fix the authentication issue affecting our online services in Watch Dogs," stated the tweet from the official Ubisoft account. "We're seeing improvements."

Update 2: According to a statement on the Xbox Support site, Microsoft is aware of and resolving issues users are experiencing with Uplay features across Ubisoft titles on Xbox 360 and Xbox One:

'Hi Xbox members, are you having trouble using the Uplay feature on games like Watch Dogs, Trials Fusion, Child of Light, and Assassin's Creed IV: Black Flag? We are working with our partner to get the issue resolved as quickly as possible. Thanks for your patience. We'll update you on our progress as soon as we have more information."

Update 3: Ubisoft issued a statement on its support site acknowledging the impact of Watch Dogs release on the servers and that it is working to keep them up:

"Dear fans with the release of Watch Dogs we are seeing an exceptional increase of activity. While we have taken many measures to limit the impact to our servers, they are not responding as fast as usual. Rest assured our team is monitoring closely our servers and taking every measures so that our services remain up. Thank you for your patience."