Coursera has made an announcement to update their technology platform, that will affect access to some courses. Majority of the courses are already offered on the new platform. The old platform will be closing down as of 30 Jun 2016, and courses on the old platform will no longer be available. Users are advised to save their relevant course materials or assignments accordingly.
The old Coursera platform contains 416 courses, and a list of which can be found at https://www.class-central.com/collection/coursera-old-stack-all.
Information of this news came from: Class Central at https://www.class-central.com/report/coursera-old-platform-shutdown-download-courses.