The Church has stopped adding classes automatically to the lesson schedules. You can still add the classes. Add your events (ward conference, stake conference, general conference) first. Then manually add your classes. You will need to manually add your classes to the High Priests, Elders Quorum, Relief Society, Primary, and Sunday School classes. The youth Sunday School, Young Men, and Young Women are automatically added because their courses are all online. To add a lesson, I click the edit icon by the week I want to enter the class. I select "Topic (Custom)". From here, I open another window in my browser and go to the lesson I want there. I highlight the title of the lesson and copy it. I go back to the lesson schedules tab and paste the title in the "Lesson Topic" line. I go back to the LDS website where the lesson is and click on the link in the upper left search bar. I copy the link to the website. It will look something like this: "https://www.lds.org/manual/teachings-of-presidents-of-the-church-gordon-b-hinckley/chapter-10-nurturing-the-eternal-partnership-of-marriage?lang=eng". I paste it in the "Lesson URL" line. If I know who the teacher is, I put them in. I then click the save button.
I know this is a bit of a hassle, but I have our ward using it all the time. I am glad they left the program up so that we can still utilize it. They just won't propagate the reading materials in the classes anymore.