Do you have more than one Org that you are a member of?  I get this error a lot when I have used console or experience apps under another org.  Then when I click the URL in terminal or paste it in the browser the browser defaults me into an Org the app was NOT published in.  Org A I created my app i...

So assuming the new developer is going to be working in their own workspace in the project.Go into the Adobe Developer Console > project your working on > new developers workspace and add all the services you needed for the project. The new developer will download the code into their local developme...