1. Review your document and see if there are any sections breaks present already.
2. Check your document layout to make sure that sections breaks are enabled.
3. Try undoing any recent changes made to your document.
4. If it is a Word document, check the document formatting options.
5. Try changing the margin size of the page by going to Format > Paragraph > Indents and Spacing > Special.
6. Look for any typos, faulty hyperlinks, or any other formatting errors.
7. Try restarting your computer and re-opening the document.
8. If the problem persists, contact your IT support team for assistance.