When you try to navigate you end up getting 404 errors. For example navigate to MapiCalendar using the left side navigation and you will get a 404 - File or directory not found.
I have worked over the issue and its seems to be an issue with redirected link in API reference guide section. An issue with ID EMAILJAVA-34594 has been created in our issue tracking system to further investigate and resolve the issue. This thread has been linked with the issue so that you may be notified once the issue will be fixed.