Hi LuisSousa, welcome.
Yes, you fix it yourself.
Seems like you didn't install all required libraries.
I don't know whether Adafruit_GFX.h is included in the MCUFRIEND_kbv library or not, so you should check that.
If it is not, install that library by using the library manager.
I have it installed for some time already, so i can't tell you whether it came as part of something else or not.
Also check to see you need other libraries as well for this sketch of yours.
By the way, this thread wasn't meant for questions like this.
Please be sure you put you questions in the correct location.
That way, chances are a lot better you will be promptly helped with some suiting suggestions.