If you're unable to access the course link from your emails, here's something you can do.
Direct Access
You can directly access the course by visiting https://courses.dts.edu/. Simply type the URL into your browser's address bar and log in with your account. Once logged in, select the course you would like to continue with.
Dashboard Access:
Another option is to access all of your currently enrolled courses through your student dashboard. You can find all of your enrollments by using this link: https://courses.dts.edu/enrollments.