Probleme mit Libary OLED SSD1331

Hi, I git some trouble with installing of the Libary SSD1331.
I got folowing error message:

Arduino: 1.8.2 (Windows 10), Board: “Arduino Nano, ATmega328”

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\nimic\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -ide-version=10802 -build-path C:\Users\nimic\AppData\Local\Temp\arduino_build_111439 -warnings=all -build-cache C:\Users\nimic\AppData\Local\Temp\arduino_cache_656367 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\nimic\Documents\Arduino\libraries\Adafruit-SSD1331-OLED-Driver-Library-for-Arduino-master\examples\test\test.pde
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\nimic\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -ide-version=10802 -build-path C:\Users\nimic\AppData\Local\Temp\arduino_build_111439 -warnings=all -build-cache C:\Users\nimic\AppData\Local\Temp\arduino_cache_656367 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\nimic\Documents\Arduino\libraries\Adafruit-SSD1331-OLED-Driver-Library-for-Arduino-master\examples\test\test.pde
Using board ‘nano’ from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Using core ‘arduino’ from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Detecting libraries used…
“C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++” -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10802 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR “-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino” “-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs” “C:\Users\nimic\AppData\Local\Temp\arduino_build_111439\sketch\test.pde.cpp” -o “nul”
“C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++” -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10802 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR “-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino” “-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs” “C:\Users\nimic\AppData\Local\Temp\arduino_build_111439\sketch\test.pde.cpp” -o “C:\Users\nimic\AppData\Local\Temp\arduino_build_111439\preproc\ctags_target_for_gcc_minus_e.cpp”
C:\Users\nimic\Documents\Arduino\libraries\Adafruit-SSD1331-OLED-Driver-Library-for-Arduino-master\examples\test\test.pde:38:26: fatal error: Adafruit_GFX.h: No such file or directory

#include <Adafruit_GFX.h>

^

compilation terminated.

exit status 1
Fehler beim Kompilieren für das Board Arduino Nano.

But the file is in the right directory? (see att.)

Thanks for helping

Michael

Here is the path ...

Your mising aditional library Adafruit_GFX.h

fatal error: Adafruit_GFX.h: No such file or directory

Thank you