What is the problem?
Run the [Adafruit_Python_SSD1306] script
(GitHub - adafruit/Adafruit_Python_SSD1306: Python library to use SSD1306-based 128x64 or 128x32 pixel OLED displays with a Raspberry Pi or Beaglebone Black.)

What did you already try to solve it?
Google it but did not find any solution

Additional information about your setup
OctoPrint 1.5.3
Python 3.7.3
OctoPi 0.18.0

pi@octopi:~/Adafruit_Python_SSD1306 $ sudo python install
Traceback (most recent call last):
File "", line 3, in
from setuptools import setup, find_packages
ImportError: No module named setuptools

If someone could be so kind to help me. The pi recognises the screen but does not run the script.

Did you run sudo python -m pip install --upgrade pip setuptools wheel before you tried to install it?

I suggest you try to install the library via pip with sudo pip install Adafruit-SSD1306