buildx bake failed with: ERROR: failed to solve: target stage "py-installer" could not be found

Unexpected input(s) 'target', valid inputs are ['targets', 'set', 'push', 'dockerhub_owner', 'dockerhub_username', 'dockerhub_token', 'quay_owner', 'quay_username', 'quay_token', 'hw_owner', 'hw_username', 'hw_token']