laravel 8 composer require laravel/ui fails code example

Example 1: composer require laravel/ui laravel 7

composer require laravel/ui:^2.4

Example 2: composer require laravel/ui laravel 7

// Generate basic scaffolding...
php artisan ui bootstrap
php artisan ui vue
php artisan ui react

// Generate login / registration scaffolding...
php artisan ui bootstrap --auth
php artisan ui vue --auth
php artisan ui react --auth