Laravel 6 Unable to run artisan ui vie for new project-CodePudding

I'm busy setting up a new Laravel 6 Project (on Debian 10 with php8.0), which was all working fine.

cd /opt/laravel/

Install local composer to current directory /opt/laravel/

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '906a84df04cea2aa72f40b5f787e49f22d4c2f19492ac310e8cba5b96ac8b64115ac402c8cd292b8a03482574915d1a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

Create the Laravel 6 Project

php composer.phar create-project --prefer-dist laravel/laravel testapp "6.*"

This seems to work fine, then install local composer for this project

cd /opt/laravel/testapp

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '906a84df04cea2aa72f40b5f787e49f22d4c2f19492ac310e8cba5b96ac8b64115ac402c8cd292b8a03482574915d1a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

But when I try to install laravel/ui

php composer.phar require laravel/ui --dev

I'm getting a big fat error

Using version ^3.4 for laravel/ui
./composer.json has been updated
Running composer update laravel/ui
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - laravel/ui[v3.4.0, ..., 3.x-dev] require illuminate/console ^8.42|^9.0 -> found illuminate/console[v8.42.0, ..., 8.x-dev, v9.0.0-beta.1, ..., 9.x-dev] but these were not loaded, likely because it conflicts with another require.
    - Root composer.json requires laravel/ui ^3.4 -> satisfiable by laravel/ui[v3.4.0, ..., 3.x-dev].

You can also try re-running composer require with an explicit version constraint, e.g. "composer require laravel/ui:*" to figure out if any version is installable, or "composer require laravel/ui:^2.1" if you know which you need.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.

Is there something in my set up causing this install to fail?

CodePudding user response：

try running

composer update

if that doesnt work try

composer dump-autoload

but do you need the --dev version? perhaps just the vanilla version would work for you?

php composer.phar require laravel/ui