I found a way to resolve this issue. In Xcode menu choose Settings. In Settings choose Accounts tab. If you haven't added your Apple ID to the list, click the "+" and do so. You should now have a "team" that looks like `My Name (Personal Team). Then go to the "Signing and Capabilities" tab (which appears in the tab set along with "Build Settings" and "Build Phases" etc.) Now make sure that "Team" is set to "My Name (Personal Team)", make sure your bundle identifier is filled out uniquely, and make sure that "Signing Certificate" is set to "Developer", and not "Run Locally".