Please check if the job was sent to "Drafts" and check which of the required fields is missing.
If the Location or Department is missing, reach out to your admins to make sure the fields are part of the list of values uploaded in Employee Referrals.
If the Contact Person (recruiter) field is empty, please make sure the responsible recruiter is registered to Employee Referrals. If not, please them to register and assign the job to them manually.
If the Reward field is missing, check that the reward plan has the same name in your ATS and in your Reward Plan.
If the job is not listed in "Draft", please make sure you ticked the channel in your ATS that publishes jobs to Employee Referrals.