CoursePress Units Shows as Locked for Students

When logged in as admin, there is no problem. But when a student logs in, goes to this course units page (https://*******websites.com/demo/courses/iron-tribe-6-week-fitness-challenge-january-2017/units/), the units are shown as locked: https://monosnap.com/file/dJnhcGGnduAAHE8Uw1UhgmI4WWLJiW