Fatal error: Class 'Slim\Views' not found

[Sirjoseph94]

I keep getting this error when i try to use the twig template engine with Slim.
this is my composer.json

{
"require": {
"slim/slim": "^3.8",
"directus/sdk": "0.2.*",
"slim/twig-view": "dev-master"

},

"minimum-stability": "dev",
"repositories": [
    {
        "type": "git",
        "url": "https://github.com/wellingguzman/zend-db"
    }
]

}

below is a screen shot of the codes

[geggleto]

We cannot support your use of a private repo. Please use the public repo.

Please do not use dev-master; use a tagged version.