After launching fabric-loader-1.20.1 i get the error :

The game crashed whilst initializing game
Error: java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors, provided by 'autoswitch'!

using autoswitch-6.0.2

crash-2023-06-21_18.36.16-client.txt

You need to use AS 7 for MC 1.20+. Alpha builds are available on Modrinth, it will be some time before it goes to CF.