Hello, @tertiumquid 
Welcome to the Canvas Community! This sounds like a problem with how access to that file has been configured by the instructor or designer of the course. You've posted your question to a global forum where people exchange their ideas and practices around Canvas software, but the participants here don't have access to specific courses. Please contact your instructor to request that the link be repaired. The fastest way to do that is through the Canvas Inbox (How do I send a message to a user in a course in the Inbox as a student?).
