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Hi, I wasn't able to see the screenshots, but hope this helps solve your issue.

I was running into the same issue, and solved by using the following pieces of code.

First, I defined an action client:

self._action_client = ActionClient(self, NavigateToPose, 'navigate_to_pose')

I then define a callback function to get the feedback using:

self.get_logger().info('Received feedback: {0}'.format(feedback))