Klipper shows "MCU 'mcu' shutdown: Not a valid PWM pin"

[Maxim]

Basic Information:

Printer Model: Ender 3
MCU / Printerboard: Octopus Pro V1.1 (H723)

klipper shows “MCU ‘mcu’ shutdown: Not a valid PWM pin”

this is my klippy log
klippy (7).log (4.9 MB)

…

[Maxim]

Fixed this issue by changing the fan from PA8 port to PD12 port