It is not assigned to an external career site

Job requirement is posted with the option to post now, it is not assigned to an external career site

The application was created as a blank application with the necessary data and when the publication is made with the option of post now now or post later, clicking on the save button does not assign a career site, therefore it does not publish the vacancy on the site external career although in the post section it says that it is published.

Thanks for your time