Make it robot following line error

I am having the next error after I already create the library and uplload the zip file to my Arduino IDE.

linefollow.ino:23:45: fatal error: MakeItRobotics.h: No such file or directory
compilation terminated.

Could some one tell me how to solve it or where can I get the right files,

Thank you.

Is the zip unzipped?

Sketch >Include library > Add .zip Library