Laravel error when using composer to setup

I am a php beginner. I got some problem when using composer to initially extend the project. Your kindness would be highly appreciate.

Hereby is the trace infomation and composer.jason.

Stack trace: #0 C:\Users\jim\git\laravel\vendor\laravel\framework\src\Illuminate\Container\Container.php(809): ReflectionClass->__construct() #1 C:\Users\jim\git\laravel\vendor\laravel\framework\src\Illuminate\Container\Container.php(691): Illuminate\Container\Container->build() #2 C:\Users\jim\git\laravel\vendor\laravel\framework\src\Illuminate\Foundation\Application.php(796): Illuminate\Container\Container->resolve() #3 C:\Users\jim\git\laravel\vendor\laravel\framework\src\Illuminate\Container\Container.php(269): Illuminate\Foundation\Application->resolve() #4 C:\Users\jim\git\laravel\vendor\laravel\framework\src\Illuminate\Container\Container.php(805): Illuminate\Container\Container->Illuminate\Container{closure}() #5 C:\Users\jim\git\laravel\vendor\laravel\framework\src\Illuminate\Container\Container.php(691): Illuminate\Container\Container- in C:\Users\jim\git\laravel\vendor\laravel\framework\src\Illuminate\Container\Container.php on line 811 Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 255

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{ "name": "laravel/laravel", "type": "project", "description": "The Laravel Framework.", "keywords": [ "framework", "laravel" ], "license": "MIT", "require": { "php": "^7.2.5", "fideloper/proxy": "^4.2", "fruitcake/laravel-cors": "^2.0", "guzzlehttp/guzzle": "^6.3", "laravel/framework": "^7.24", "laravel/tinker": "^2.0" }, "require-dev": { "facade/ignition": "^2.0", "fzaninotto/faker": "^1.9.1", "mockery/mockery": "^1.3.1", "nunomaduro/collision": "^4.1", "phpunit/phpunit": "^8.5" }, "config": { "optimize-autoloader": true, "preferred-install": "dist", "sort-packages": true }, "extra": { "laravel": { "dont-discover": [] } }, "autoload": { "psr-4": { "App\\": "app/" }, "classmap": [ "database/seeds", "database/factories" ] }, "autoload-dev": { "psr-4": { "Tests\\": "tests/" } }, "minimum-stability": "dev", "prefer-stable": true, "scripts": { "post-autoload-dump": [ "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump", "@php artisan package:discover --ansi" ], "post-root-package-install": [ "@php -r \"file_exists('.env') || copy('.env.example', '.env');\"" ], "post-create-project-cmd": [ "@php artisan key:generate --ansi" ] } }

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I try to track the exception and found error indicator in app.php

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