FreePBX links disabled?

When I log into FreePBX, a few of my link are black, and I can’t click on them, like:
Extensions
Day/Night Control
Follow Me

How do I get those back?

Did you go into tools|module admin and check for updates on those modules? They probably either need an updated version or they somehow got disabled and need to be reenabled. If all else fails, try uninstalling and then reinstalling the module(s) in question.