A common "negative review" point for this build is that it required all players in a lobby to be on the exact same build ID. If one friend hadn't updated to 9377745, they would appear offline or unable to join matches.
Are you experiencing a specific in this build that I can help you troubleshoot? UNO Patches and Updates - SteamDB UNO Build 9377745
The primary purpose of this build was to correct an issue where players were unable to get online. While it fixed the issue for some, others reported that invites to friends remained bugged or completely non-functional through certain overlays (like Steam versus Ubisoft Connect). A common "negative review" point for this build
Reviews and user reports for this specific build are mixed, leaning toward frustration due to connectivity issues that the build attempted to address but did not fully resolve for everyone: UNO Patches and Updates - SteamDB The primary
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 .