The Program List can show icons next to programs to warn that programs are incomplete. Here's a list of those icons with their meanings.
Click on Programs
Hover your mouse on each of these icons, and you will see a brief description of their meanings
Program List Icons
If Flex Registration option setup is incomplete icon displays, you will not be able to register for that program until you edit, review and save the FlexReg options under the Flex tab for that program.