paper-display | Show tweets or whatever you 'd like on an E-ink display | Frontend Framework library

I am trying to control an epaper display with a raspberry pi zero. I am following this great tutorial: https://beenje.github.io/blog/posts/my-lego-macintosh-classic-with-raspberry-pi-and-e-paper-display/ He did work with a Pi Zero as well.

I got the ansible playbook running which would get me a clock on the display. But the display does not change. If I'm ejecting the SD card and putting it into a Pi 3 that I got at home, the clock is running perfectly on the epaper display.

Because I thought that something is wrong with the pins of my pi zero, I ordered a new Pi. But it's all the same. I've used different power supplies as well. To change the power supply port of the Pi Zero hasn't helped either.

When I tried a different approach over a docker container that's deployed in the cloud (resin.io) the display has changed. Everything worked.

How is it possible that all the same software is running perfectly on a Pi 3 and on a Pi Zero, it is not working. Especially since it is working for Benjamin - the author of the tutorial I'm following.

I am on Raspbian Stretch because Benjamin has used it, too.

Edit: I'm using a Pi Zero with presoldered header

Thank you!