I recommend you to join the stealthchanger discord.
Quote from the discord, user “vin”:
Oh. If you are using viesturz/klipper-toolchanger, make sure:
klipper v0.13.0-35
klipper-toolchanger v0.0.0-134
These are the versions you need. Here is how it’s done: How downgrade Klipper version? - #2 by gaolst