Hi, @rcorrea 
Welcome to the Canvas Community! There are numerous reasons that a student might see an Access Denied message, but the members of this forum won't be able to troubleshoot why it might be occurring in a particular course. Please contact the teacher to ask why the module item is not available by sending them a message through the Canvas Inbox ( How do I send a message to a user in a course in the Inbox as a student?)
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.