The cause is more technically complicated than what is described below. However, CDD 6.9 implements the use of a different Agent Central Rest API that does not have these restrictions.
The connection established between a CDD endpoint and an Agile Central Workspace is based on two things:
- Workspace name
- An API Key created by a user.
The Workspace that CDD can "connect" to with that API Key depends on the default workspace, or the default project, for the user that created the API Key. You can see the default project set for a user by opening Agile Central and then navigate to My Settings -> Default Project.
Note: The test connection failure is related to the API used by CA Continuous Delivery to connect and get workspace information. The Agile Central user is able to utilize these various workspaces while working in the Rally UI.