XTools is very slow or nonfunctioning at the moment due to an issue with the databases. Please see T364151 for updates.
500: Internal Server Error
A fatal error has occurred within XTools. This has been automatically reported, but feel free to file a task on Phabricator (requires a Wikimedia account).
The server said: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away
