Could you please update this step:

ssh-add -K ~/.ssh/id_ed25519

It no longer works with the recent updates and now returns the following:

WARNING: The -K and -A flags are deprecated and have been replaced by the --apple-use-keychain and --apple-load-keychain flags, respectively. To suppress this warning, set the environment variable APPLE_SSH_ADD_BEHAVIOR as described in the ssh-add(1) manual page.

Thanks

TANK