Hi @w.ronaldo.cd ,
I think I have a small clue as to why you are getting the error.
This is because the rosject uses Foxy version, whereas the course uses Galactic version.
Some things that you copy-paste from Galactic version into Foxy version will not work.
From my experience, the only files having the problem is the bt_navigator.yaml file and the behavior.xml file.
Please post the following as code-block:
- Launch file containing the
bt_navigatornode. -
bt_navigator.yamlfile -
behavior.xmlfile
I know which ones to remove after seeing your contents of the above files.
Regards,
Girish