When you create a workspace, initially only you or a MashZone NextGen administrator may use the workspace. To allow other users to work with the workspaces you create, you or a MashZone NextGen administrator must grant run permissions to other users.

Because workspaces are apps, you grant run permissions to workspaces just as you do to any app, with one wrinkle. Users who have permission to use your workspace must also have permission to use each app and each mashable or mashup that is used by these apps. So you may have to update permissions on the apps or other artifact that are used by your workspace.

See Grant Permission to Run Mashables, Mashups and Apps for basic instructions.