Unable to connect to MCU Octoprint

Hello @Starfish !

Please attach the klippy.log to your next post.

Also read this:

You connect OctoPrint to Klipper by using /temp/printer
Klipper connects to the printer with with a certain USB serial that has to be found.

https://www.klipper3d.org/Installation.html#building-and-flashing-the-micro-controller