Can't See All CoursePress Pro Units Links

When I click on Units in CoursePress Pro in order to edit them, I can't see all the units. There are 15 Units altogether but I can only see 14 Units.

Besides, I can't see the "Add New Unit" button.

They all show while the page is loading, but once the page finishes loading, it doesn't dispaly everything.

Another admin of teh site reports that she can only see Unit 1 to 9, the rest is hidden and inaccessible.

Pls see screenshot here:

Thanks as I await your prompt help as usual.