Simple Syllabus has an approval process, which requires your Program Director and/or their designated assistant to approve your syllabus. If they see changes that need to be made, they may "reject" your syllabus and send it back to you for further editing.
Log in to Simple Syllabus or to your Canvas course (wherever you were editing your syllabus). Then click on the syllabus that got rejected and scroll to the bottom of the page. You should then be able to see comments that were made or suggestions. You can reach out personally to your approver by emailing them.
Once you have made the necessary changes, you can resubmit your syllabus to them and they can approve it.