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When I click the "g" icon in the login sidebar, this error appears in the log:
"Error in /apps/user/lib/LightOpenID.php on line 488: No OpenID Server found at https://www.google.com/accounts/o8/id, referer: http://elefant.local/user"
Google ended their support for OpenID so I should probably remove that and find an updated library that supports their current login system.
This ought to be working again with Google's updated library in the next update :)