Adafruit PWM Servo Driver exists but does not see

Hi There,
First, Sorry For My Bad English. If I have any mistakes please apologize
I Was Trying Make A XY plotter but when i try the upload (or debug) i got this Error On Ubuntu 16.04 LTS
Here's The My Error

/home/%FOLDERS%/Vplotter/polargraph_server_a1/polargraph_server_a1.ino:64:45: fatal error: utility/Adafruit_PWMServoDriver.h: No such file or directory
#include "utility/Adafruit_PWMServoDriver.h"
compilation terminated.
exit status 1
Error compiling for board Arduino/Genuino Uno.

And Here's The My Code
(Sorry About That. Codes Are Exceeded Character Limit)

https://paste.ubuntu.com/p/42Mj6GN5xs/

Please Help Me Guys, It's My School Project.

Thanks,
Murat.

You need to add the Adafruit PWM Servo driver library. Go into the Library Manager and search for it.
Sketch --> Include Library -->Manage Libraries

Isaac96:
You need to add the Adafruit PWM Servo driver library. Go into the Library Manager and search for it.
Sketch --> Include Library -->Manage Libraries

not working

Here it is in the Library Manager window


Click "Install" and it should work.

Isaac96:
Here it is in the Library Manager window


Click "Install" and it should work.

I'm sorry, I can't see the picture (net restrictions)
Could you please post it using http://forum.arduino.cc/index.php?topic=519037.0
Thanks