If your course is setup to provide an access code at the "Course Materials" page within the LMS, you will see an option to reveal your code, as well as information on where to redeem the code on that page. The Copy URL section is only clickable if it is a single link:
If there is more information or multiple links are provided in the Copy URL field, this section will not be clickable. In these cases, you will need to redeem the code within the publisher's integration in the LMS, or you will need to copy and past the correct link into a new browser window and redeem your code. Contact your instructor if you are unsure where to redeem your access code.