[Bug] Services and Actions Exercise doesn't work in sim

This is an error report.


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Error details

Hello. Unit 1, Services and Actions Exercise doesn't work in simulation.

@eduzgun
You haven’t given us much to work with.

  • What was the exercise about? What’s the objective?
  • Which code have you written? The node, the launch file, etc
  • What is working?
  • What is not working?
  • Any error messages on the terminals?

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