AUTOTUNE failed: init failed

When enabling AUTOTUNE mode, an error occurs: Mode change to AUTOTUNE failed: init failed.
Moreover, earlier I managed to set up Roll and Pitch in AUTOTUNE mode.
I have now updated ArduCopter to 4.5.1. Flight Controller Matek H743-SLIM V3.
Please tell me what is the problem?

From which mode you are trying to go to Autotune?

I switched to AutoTune from AltHold.

No log, no idea. Post a link.


I can’t figure out how to download from that link.