Tabula Rasa's main site, rgtr.com has posted an update for players experiencing trouble on the European Centaurus server. There's no fix yet, but they are still investigating the issue.
We are still investigating and working to resolve an issue that is causing high latency on the (European) Centaurus server. Updates will follow. Thank you for your patience.
Stay tuned for more news updates as they become available. In the mean time, get your Tabula Rasa fix at the Tabula Rasa Community Forums.