Exception in flush_handler

Can you determine the issue is not generated by one of these extras?

Git version: 'v0.13.0-320-gc80324946-dirty'
Untracked files: klippy/extras/led_effect.py, klippy/extras/mmu_encoder.py, klippy/extras/mmu_espooler.py, klippy/extras/mmu_led_effect.py, klippy/extras/mmu_leds.py, klippy/extras/mmu_machine.py, klippy/extras/mmu_sensors.py, klippy/extras/mmu_servo.py

In other words: Have you tried with a genuine Klipper setup (The "dirty" Flag and the Team's Position)?