Ruby2 supervisor error: "licensed number reached"

[Belinda Frick]

Make sure a RUBY Supervisor is not running in the background.
a RUBY Supervisor time-out takes 5 minutes.
On the RUBY Supervisor main screen, in the bottom
right-hand corner it shows the connections. You can check this
to see which connections are made by RUBY Supervisors,
and check it against who is actually logged in.
Close the Supervisors that are not in use, to free licences.
ALSO SEE: Ruby server log error: "handle am up"