Repetier Server unreachable on Raspberry Pi 4
I'm planning to switch from Octoprint to Repetier server, I got a brand new Raspberry Pi 4 B for this, and I followed the installation guide to install Repetier server on a 16gb sd card.
So far so good, I wasn't able to access it as access point but I had it on a lan cable so I could access it from my browser I went through the settings and set the correct timezone, then set up the wifi connection and then it rebooted... and since then it's dead
I think I have formatted and re-flashed the sd card 5 or 6 times by now, it does not show up as an access point, and it's also unreachable through the browser or Putty. I also tried making the network file and put it directly on the SD card as described on the website, but sadly that is not working either.
I'm not too familiar with Raspberries so this is going beyond my knowledge, I do not have a screen to connect it to so I cannot confirm if it's starting at all... I hope someone can give me some guidance here