Hi ! 
This command is not use for plugin creation but for Strapi applicaiton creation
npx create-strapi-app@latest your-project-name
If you want to create a plugin inside your pre created Strapi project, you can use this command instead :
npm run strapi generate plugin and then enable the plugin in the config/plugins.js|ts file
You can follow this doc : Plugin creation & setup | Strapi Documentation