UNO Build was a specific maintenance update released for the Ubisoft version of UNO (primarily on PC/Steam) around September 2022. Critical Technical Status
As this was a technical patch rather than a content expansion, the core gameplay remains the classic UNO experience, but performance varied: UNO Build 9377745
The build stabilized the core "Online" menu for many who were previously locked out. UNO Build was a specific maintenance update released
If you are currently on this build, it is a to maintain online functionality, but it is not a "flawless" version. If you're having trouble playing with friends, ensure every participant has verified their build ID in the game properties to match 9377745 . UNO Build 9377745