Cannot find "Collaborators" section anymore to add a collaborator.
I cant find a place to add a new collaborator.
Since you migrated you can no longer add collaborators to a specific application. What you can do is add contributors to the authoring resource. Refer to this documentation
you can fing the steps needed under the section "Adding contributors to authoring resources".
hope that was helpful, let us know if you are still facing any problems.
Elma Sarah Daniel commented
This is an issue I'm facing recently. I have never faced this issue before.
It is usually under the Manage tab if I'm not wrong.
Have you migrated?
please provide a screenshot of the landing page to be able to help.