Install Argon Theme

I have tried every variation of the name I can imagine and still get

composer.json says

{
    "require": {
        "twig/twig": "^3.3"
    }
}

 

cannot activate
  •  

argon-theme

This plugin is invalid: This plugin's directory must be renamed to "" to match the projectname set in the plugin composer.json. Location: /home/serenity/john.serenitytoo.com/mod/argon-theme/
After each name change the error message will reappear with  This plugin is invalid: This plugin's directory must be renamed to "" to match the projectname set in the plugin composer.json. Location: /home/serenity/john.serenitytoo.com/mod/the last name I tried/