Unable to run it

[YoursSarcastically]

yarn run v1.22.10 warning package.json: License should be a valid SPDX license expression $ parallel watchify tsc-watch 'sleep' 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.