Yarn Build ERROR - cssnano' is not recognized as an internal or external command,

[app-generator]

Full log

@mominur-helios please take a look.
TY!

(env) PS D:\work\repo-free\flask-datta-able> yarn minify-css
yarn run v1.22.18
$ cssnano static/assets/css/*.css --dir static/assets/css --no-map --suffix .min
'cssnano' is not recognized as an internal or external command,
operable program or batch file.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.