Thread:Extension talk:MediaWikiChat/Uncaught TypeError: Cannot read property 'users' of undefined/reply (2)

Once I installed the SocialProfile extension, changed $wgChatSocialAvatars = true, then it all works as normal.

I suggest that instead of stating "Enabled by default" for this item that it is disabled by default since it only works if the SocialProfile extension is installed, otherwise the chat display does not work.