Make sure you have published the course.
is there a pending text next to your course?
1. Go to wp-admin->WPLMS ->course manager.
Make sure your course status page and take this course page are set.
2. Go to edit course page of that course.
(a) If the course is not free make sure it is connect to a woocommerce product.
(b) if you want the course as free then make sure the FREE switch is enabled.
3. If the issue persists then provide me your wp-admin credentials of your site and don't forget to mark your reply as private.