Teamspeak Server() error while starting servermanager, error: instance check error

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I get the following error when starting my server (although it worked yesterday) The two errors of importance are below, the full log is below them 25/04/2016 19:07:45.118 [1]Server log message: failed to register local accounting service 25/04/2016 19:07:45.120 [1]Server log message:... Teamspeak Server() error while starting servermanager, error: instance check error