Pipelines that are not accepted by the external validation service will not be created and will not be visible in pipeline lists in GitLab UI or API. When creating the pipeline within the GitLab UI an error message stating `Pipeline cannot be run. External validation failed` will be displayed.
Pipelines not accepted by the external validation service aren't created or visible in pipeline lists, in either the GitLab user interface or API. Creating an unaccepted pipeline when using the GitLab user interface displays an error message that states: `Pipeline cannot be run. External validation failed`
