You may run into this message halting your build. This can happen when trying to access secured remote resources using SSH keys injected into your job from the UI.
Those keys are ones you've added to
This can usually be resolved by explicitly adding the SSH key fingerprint with the add_ssh_keys config option, as in the snippet below. You can find the fingerprint displayed on the page above where you added the key. Read more about add_ssh_keys here on our docs page.