What is the problem?
When printing a gcode file through OctoPrint the bed & nozzle will come up to temperature, they will both home and the nozzle will then probe the bed. At this point the printer will report an error with the following in the terminal window:
Send: N15 M420 S1 Z2*27
Recv: echo:Invalid mesh.
Recv: Error:Failed to enable Bed Leveling
Changing monitoring state from "Printing" to "Cancelling"
However if I print the same gcode file directly from the SD card plugged into the printer then it prints fine (with USB cable disconnected, see below).
The only other thing that is strange is that if I print the file from the SD card with the USB cable still connected I get some strange behaviour (pausing printing and parking the nozzle). However with the USB cable disconnected it prints with no issue every time. This was the reason for replacing the USB cable and trying a different USB port on the Pi.
The system has been working fine for a long time before all this happened. No recent changes to printer firmware and only routine updates to OctoPrint. No new plugins installed. Running in safe mode didn't make any difference which would remove plugins as being the problem.
What did you already try to solve it?
Reloaded the printer firmware - no change
Fresh install of OctoPi on a fresh SD card - no change
Replaced USB cable between Pi & printer - no change
Used different USB port on the Pi - no change
Have you tried running in safe mode?
Did running in safe mode solve the problem?
You can download this in OctoPrint's System Information dialog ... no bundle, no support!)
octoprint-systeminfo-20221227090900.zip (923.9 KB)
Additional information about your setup
OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible
OctoPrint version: 1.8.6
OctoPi version: 0.18.0
Printer: Creality CR10S Pro v2
Firmware: Nic Wilson's custom firmware for 12864 LCD instead of original touchscreen
O/S: Linux Mint 20.3
Browser: Brave & Chrome