How to make laravel run on my local server

I bought a laravel script, is working online and is not running locally. when i run it locally i see error Fatal error: Interface 'Psr\Container\ContainerInterface' not found in C:\xampp72\htdocs\investment\cronlab\vendor\laravel\framework\src\Illuminate\Contracts\C ontainer\Container.php on line 8 but online is ok

my composer.json file{ "name": "laravel/laravel", "description": "The Laravel Framework.", "keywords": ["framework", "laravel"], "license": "MIT", "type": "project", "require": { "php": ">=7.0.0", "adamwathan/eloquent-oauth-l5": "^0.5.2", "barryvdh/laravel-debugbar": "^3.1", "fideloper/proxy": "~3.3", "graham-campbell/markdown": "^9.0", "greggilbert/recaptcha": "^2.2", "guzzlehttp/guzzle": "^6.3", "laravel/framework": "5.5.*", "laravel/tinker": "~1.0", "paypal/rest-api-sdk-php": "*", "unicodeveloper/laravel-paystack": "^1.0" }, "require-dev": { "filp/whoops": "~2.0", "fzaninotto/faker": "~1.4", "mockery/mockery": "~1.0", "phpunit/phpunit": "~6.0" }, "autoload": { "classmap": [ "database/seeds", "database/factories" ], "psr-4": { "App\\": "app/", "Meow\\Halum\\": "vendor/meow/halum/src" } }, "autoload-dev": { "psr-4": { "Tests\\": "tests/" } }, "extra": { "laravel": { "dont-discover": [ ] } }, "scripts": { "post-root-package-install": [ "@php -r \"file_exists('.env') || copy('.env.example', '.env');\"" ], "post-create-project-cmd": [ "@php artisan key:generate" ], "post-autoload-dump": [ "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump", "@php artisan package:discover" ] }, "config": { "preferred-install": "dist", "sort-packages": true, "optimize-autoloader": true } } s

via Chebli Mohamed