UPDATE April 7th, 2019 1:20 PM EST - This issue has now been resolved. Please restart Uplay if you are still experiencing this issue.

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WORKAROUND: In game options, please set your group to 'open to friends'. Changing privacy settings to public allows friends to join directly from the overlay. Please understand, that this may not be an option for all titles affected. If this option is unavailable, rest assured that we are working to provide a solution as soon as possible. Apologies for the inconvenience. In the meantime, we appreciate your patience and understanding.


----UPDATE 15:37 BST------

We've identified the cause of the issue and our team are working to fix it.

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Hello everyone.

We're aware of an issue currently affecting the social aspects of Uplay PC (Inviting Friends, Messaging etc.) and are working towards resolving this

We apologize for any inconvenience caused and appreciate your patience. Please be sure to check this thread for future updates.

Thanks.