laravel can't start first project - laravel

Question

After downloading the latest php and installing composer. then installed laravel using the command
composer global require laravel/installer
Changed current directory to C:/Users/User/AppData/Roaming/Composer
Using version ^4.2 for laravel/installer
./composer.json has been created
Running composer update laravel/installer
Loading composer repositories with package information
Updating dependencies
Lock file operations: 13 installs, 0 updates, 0 removals
- Locking laravel/installer (v4.2.8)
- Locking psr/container (1.1.1)
- Locking symfony/console (v5.3.6)
- Locking symfony/deprecation-contracts (v2.4.0)
- Locking symfony/polyfill-ctype (v1.23.0)
- Locking symfony/polyfill-intl-grapheme (v1.23.1)
- Locking symfony/polyfill-intl-normalizer (v1.23.0)
- Locking symfony/polyfill-mbstring (v1.23.1)
- Locking symfony/polyfill-php73 (v1.23.0)
- Locking symfony/polyfill-php80 (v1.23.1)
- Locking symfony/process (v5.3.4)
- Locking symfony/service-contracts (v2.4.0)
- Locking symfony/string (v5.3.3)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 13 installs, 0 updates, 0 removals
0 [>---------------------------] 0 [>---------------------------]
- Installing symfony/polyfill-php80 (v1.23.1): Extracting archive
- Installing symfony/process (v5.3.4): Extracting archive
- Installing symfony/polyfill-mbstring (v1.23.1): Extracting archive
- Installing symfony/polyfill-intl-normalizer (v1.23.0): Extracting archive
- Installing symfony/polyfill-intl-grapheme (v1.23.1): Extracting archive
- Installing symfony/polyfill-ctype (v1.23.0): Extracting archive
- Installing symfony/string (v5.3.3): Extracting archive
- Installing psr/container (1.1.1): Extracting archive
- Installing symfony/service-contracts (v2.4.0): Extracting archive
- Installing symfony/polyfill-php73 (v1.23.0): Extracting archive
- Installing symfony/deprecation-contracts (v2.4.0): Extracting archive
- Installing symfony/console (v5.3.6): Extracting archive
- Installing laravel/installer (v4.2.8): Extracting archive
0/13 [>---------------------------] 0%
10/13 [=====================>------] 76%
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13/13 [============================] 100%
6 package suggestions were added by new dependencies, use `composer suggest` to see details.
Generating autoload files
11 packages you are using are looking for funding.
Use the `composer fund` command to find out more!`
After installation created a project laravel new example-app
Creating a "laravel/laravel" project at "./example-app"
Installing laravel/laravel (v8.6.1)
- Installing laravel/laravel (v8.6.1): Extracting archive
Created project in C:\test/example-app
> #php -r "file_exists('.env') || copy('.env.example', '.env');"
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.
Problem 1
- laravel/framework[v8.54.0, ..., 8.x-dev] require league/flysystem ^1.1 -> satisfiable by league/flysystem[1.1.0, ..., 1.x-dev].
- league/flysystem[1.1.0, ..., 1.x-dev] require ext-fileinfo * -> it is missing from your system. Install or enable PHP's fileinfo extension.
- Root composer.json requires laravel/framework ^8.54 -> satisfiable by laravel/framework[v8.54.0, v8.55.0, v8.56.0, 8.x-dev].
To enable extensions, verify that they are enabled in your .ini files:
- C:\php7\php.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
Then I performed cd example-app и php artisan serve. После выполнения php artisan serve gives an error message :
PHP Warning: require(C:\test\example-app/vendor/autoload.php): Failed to open stream: No such file or directory in C:\test\example-app\artisan on line 18
PHP Fatal error: Uncaught Error: Failed opening required 'C:\test\example-app/vendor/autoload.php' (include_path='.;C:\php\pear') in C:\test\example-app\artisan:18
Stack trace:
#0 {main}
thrown in C:\test\example-app\artisan on line 18
After walking through the forums, I realized that there was not enough folder vendor in project
Project with files
After adding the vendor folder to the project using the command composer dump-autoload.The folder was added but after running the command composer dump-autoload a new error popped up :
Generating optimized autoload files
Class Illuminate\Foundation\ComposerScripts is not autoloadable, can not call post-autoload-dump script
> #php artisan package:discover --ansi
PHP Fatal error: Uncaught Error: Class "Illuminate\Foundation\Application" not found in C:\test\example-app\bootstrap\app.php:14
Stack trace:
#0 C:\test\example-app\artisan(20): require_once()
#1 {main}
thrown in C:\test\example-app\bootstrap\app.php on line 14
Script #php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 255
Then I tried to execute the command php artisan serve .Throws this error :
PHP Fatal error: Uncaught Error: Class "Illuminate\Foundation\Application" not found in C:\test\example-app\bootstrap\app.php:14
Stack trace:
#0 C:\test\example-app\artisan(20): require_once()
#1 {main}
thrown in C:\test\example-app\bootstrap\app.php on line 14
Then, walking around the forums, I just did not run to fix this problem I tried:
Composer update,
Composer install,
composer update --no-scripts
composer dump-autoload
composer install --no-scripts
I also tried this :
php artisan clear-compiled
composer dump-autoload
And tried to delete the vendor folder.
And so I tried it, though it says that there is no such file:
composer update --no-scripts
cd bootstrap/cache/->rm -rf *.php
composer dump-autoload
Nothing helped . I do not know what to do. And how to solve this problem.