Navigation button missing at the bottom of the page

Issue in ./help/migrated/kb/unable-to-view-submitted-file.md
All pages have "Previous page" and "Next page" navigation buttons at the bottom.
This is the last page in the Learning Manager User Guide (https://experienceleague.adobe.com/en/docs/learning-manager/using/user-guide). The page has no navigation buttons - there should be a "Previous page" button.

Open ./help/migrated/kb/unable-to-view-submitted-file.md and compare its bottom navigation with adjacent pages in the Learning Manager User Guide. Add the missing Previous page navigation, then check the rendered page to confirm the button appears and points to the preceding page.

Written by the indexing model from the issue text.