Got lazy but have posted once about my Extruder being the reason why Octoprint or Firmware is not starting the Print.
I compiled my Marlin Firmware by adding
#define DEFAULT_Kp 16.44
#define DEFAULT_Ki 1.58
#define DEFAULT_Kd 42.75
and it starts, but it does weirdly extrude. When I hit "Extrude 5mm" Manually while nothing is running then it seems like a nice constant flow, but when Printing it somehow stocks, retracts or smth when trying to print. At first I thought its TPU and a new abstract material I have never touched but this currently is the good old Black PLA from Creality that I always used.
I use Cura and just used the default settings for PLA like always.
You can compile a new Marlin for new features but you should know what you are doing and which features you need/want. I have compiled the newes version for myself but I did that because I needed some custom options because I modified the printer.