Hi Brigid,
This is a public discussion board for Canvas users from different schools all over the world, so we have no access to your course or your school's Canvas server. You will want to contact the Help Desk or Canvas Support at your school so they can investigate.
In some cases, there are formatting problems on a Canvas page that prevent it from displaying in a particular web browser. Be sure that you have updated whatever web browser you are using to the most recent. version, and perhaps try logging into Canvas with a different web browser.
Mike
