Signing the "No account for the team" code when signing for another developer account

Question

I was working on an application for a client using my own Apple Developer account, while I wait for them to register their own developer account.

They did it - and the time has come for them to be able to create and run the project on their machine, but they get this error:

Code Signing Error: No account for team "59xxxxxxxx". Add a new account in the Accounts preference pane or verify that your accounts have valid credentials. Code Signing Error: No signing certificate "iOS Development" found: No "iOS Development" signing certificate matching team ID "59xxxxxxxx" with a private key was found.

The command identifier in the error message belongs to me, which I used to create the project on my computers.

Their account is already set in the Xcode settings area, and I was added to this group as a member.

I worked on other projects with other developers, where we could build a project by simply selecting our appropriate command from the drop-down menu in the "Signing" section of the general project settings. For some reason, when my client selects his team and tries to build a project, it still produces this error.

Does anyone know what we are doing wrong?

Answer 1

For me, the solution was to install the command in both the general settings and the build settings.

I am using xcode 9.

Answer 2

The solution for me was to install the command in the general settings of the goal and in the general settings of the tests.

Answer 3

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Answer 4

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Answer 5

using xcode 10 here ... my appleID was not registered, so I fixed it through settings> accounts> re-entering the password.

BUT, this still didn't work even after cleaning and restarting xcode.

I finally solved this problem by running the command file> settings of workspace> build system ... and selecting "Legacy Build System" from the drop-down list.