Can't install Cashier on Laravel 10 with Composer

I'm getting nowhere fast with this. I've seen several posts about this or similar issues but none with a good solution.

I am simply installing Laravel Cashier on a fresh Laravel 10 local dev install. Everything else is working fine. I have been working with laravel-stripe-php and have already installed laravel-stripe-webhooks, but now want to install Cashier to handle subscriptions. I have updated everything, am running latest version of stripe-php (^14.5), PHP version 8.1.10 and have cleared composer caches. I have also rebooted Apache and MySQL, all to no avail.

Here's what I'm getting:

composer require laravel/cashier --with-all-dependencies
./composer.json has been updated
Running composer update laravel/cashier --with-all-dependencies
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - laravel/cashier[v1.0.0, v2.0.0, ..., v2.0.8] require illuminate/filesystem ~4.1 -> found illuminate/filesystem[v4.1.0, ..., v4.2.17] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v3.0.0, ..., v3.0.5, v4.0.0, ..., v4.0.3, v5.0.0, ..., v5.0.15] require illuminate/filesystem ~5.0 -> found illuminate/filesystem[v5.0.0, ..., v5.8.36] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v6.0.0, ..., v6.0.20] require illuminate/database ~5.1 -> found illuminate/database[v5.1.1, ..., v5.8.36] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v7.0.0, ..., v7.2.2, v8.0.0, ..., v8.0.1] require illuminate/database ~5.3 -> found illuminate/database[v5.3.0, ..., v5.8.36] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v9.0.0, ..., v9.0.1] require illuminate/database ~5.7 -> found illuminate/database[v5.7.0, ..., v5.8.36] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v9.1.0, ..., v9.2.1] require illuminate/database ~5.7.0|~5.8.0 -> found illuminate/database[v5.7.0, ..., v5.8.36] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v9.3.0, ..., v9.3.3] require illuminate/contracts ~5.7.0|~5.8.0|~5.9.0 -> found illuminate/contracts[v5.7.0, ..., v5.8.36] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier v9.3.4 requires illuminate/contracts ~5.7.0|~5.8.0|~5.9.0|^6.0 -> found illuminate/contracts[v5.7.0, ..., v5.8.36, v6.0.0, ..., v6.20.44] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v9.3.5, ..., v9.3.6] require illuminate/contracts ~5.7.0|~5.8.0|^6.0 -> found illuminate/contracts[v5.7.0, ..., v5.8.36, v6.0.0, ..., v6.20.44] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v10.0.0, ..., v10.1.0] require illuminate/contracts ~5.8.0|^6.0 -> found illuminate/contracts[v5.8.0, ..., v5.8.36, v6.0.0, ..., v6.20.44] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v10.1.1, ..., v10.7.1] require illuminate/contracts ~5.8.0|^6.0|^7.0 -> found illuminate/contracts[v5.8.0, ..., v5.8.36, v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v11.0.0, ..., v11.3.1, v12.0.0, ..., v12.2.0] require illuminate/contracts ^6.0|^7.0 -> found illuminate/contracts[v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v12.3.0, ..., v12.14.1] require illuminate/contracts ^6.0|^7.0|^8.0 -> found illuminate/contracts[v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6, v8.0.0, ..., v8.83.27] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier v12.15.0 requires illuminate/console ^6.0|^7.0|^8.0 -> found illuminate/console[v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6, v8.0.0, ..., v8.83.27] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v12.16.0, ..., v12.17.2] require illuminate/support ^6.0|^7.0|^8.0|^9.0 -> found illuminate/support[v6.0.0, ..., v6.20.44, v7.0.0, ..., v7.30.6, v8.0.0, ..., v8.83.27, v9.0.0, ..., v9.52.16] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v13.0.0, ..., v13.1.0] require illuminate/contracts ^8.0 -> found illuminate/contracts[v8.0.0, ..., v8.83.27] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v13.2.0, ..., v13.6.1] require illuminate/console ^8.0 -> found illuminate/console[v8.0.0, ..., v8.83.27] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v13.7.0, ..., v13.8.3] require illuminate/support ^8.0|^9.0 -> found illuminate/support[v8.0.0, ..., v8.83.27, v9.0.0, ..., v9.52.16] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v13.8.4, ..., v13.16.0] require illuminate/support ^8.37|^9.0 -> found illuminate/support[v8.37.0, ..., v8.83.27, v9.0.0, ..., v9.52.16] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier v13.17.0 requires stripe/stripe-php ^7.39|^8.0|^9.0 -> found stripe/stripe-php[v7.39.0, ..., v7.128.0, v8.0.0, ..., v8.12.0, v9.0.0, ..., v9.9.0] but it conflicts with your root composer.json require (^14.5).
    - laravel/cashier[v14.0.0, ..., v14.6.0] require illuminate/support ^9.21 -> found illuminate/support[v9.21.0, ..., v9.52.16] but these were not loaded, likely because it conflicts with another require.
    - laravel/cashier[v14.7.0, ..., v14.14.0] require stripe/stripe-php ^7.39|^8.0|^9.0|^10.0 -> found stripe/stripe-php[v7.39.0, ..., v7.128.0, v8.0.0, ..., v8.12.0, v9.0.0, ..., v9.9.0, v10.0.0, ..., v10.21.0] but it conflicts with your root composer.json require (^14.5).
    - laravel/cashier[v15.0.0, ..., v15.3.2] require stripe/stripe-php ^13.0 -> found stripe/stripe-php[v13.0.0, ..., v13.18.0] but it conflicts with your root composer.json require (^14.5).
    - Root composer.json requires laravel/cashier * -> satisfiable by laravel/cashier[v1.0.0, v2.0.0, ..., v2.0.8, v3.0.0, ..., v3.0.5, v4.0.0, v4.0.1, v4.0.2, v4.0.3, v5.0.0, ..., v5.0.15, v6.0.0, ..., v6.0.20, v7.0.0, ..., v7.2.2, v8.0.0, v8.0.1, v9.0.0, ..., v9.3.6, v10.0.0, ..., v10.7.1, v11.0.0, ..., v11.3.1, v12.0.0, ..., v12.17.2, v13.0.0, ..., v13.17.0, v14.0.0, ..., v14.14.0, v15.0.0, ..., v15.3.2].

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

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

FWIW, here's my composer.json contents:

{
    "name": "laravel/laravel",
    "type": "project",
    "description": "The skeleton application for the Laravel framework.",
    "keywords": ["laravel", "framework"],
    "license": "MIT",
    "require": {
        "php": "^8.1",
        "guzzlehttp/guzzle": "^7.2",
        "laravel/framework": "^10.10",
        "laravel/sanctum": "^3.3",
        "laravel/tinker": "^2.8",
        "laravel/ui": "^4.5",
        "spatie/laravel-stripe-webhooks": "^3.8",
        "stripe/stripe-php": "^14.5"
    },
    "require-dev": {
        "fakerphp/faker": "^1.9.1",
        "laravel/pint": "^1.0",
        "laravel/sail": "^1.18",
        "mockery/mockery": "^1.4.4",
        "nunomaduro/collision": "^7.0",
        "phpunit/phpunit": "^10.1",
        "spatie/laravel-ignition": "^2.0"
    },
    "autoload": {
        "psr-4": {
            "App\": "app/",
            "Database\Factories\": "database/factories/",
            "Database\Seeders\": "database/seeders/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\": "tests/"
        }
    },
    "scripts": {
        "post-autoload-dump": [
            "Illuminate\Foundation\ComposerScripts::postAutoloadDump",
            "@php artisan package:discover --ansi"
        ],
        "post-update-cmd": [
            "@php artisan vendor:publish --tag=laravel-assets --ansi --force"
        ],
        "post-root-package-install": [
            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "@php artisan key:generate --ansi"
        ]
    },
    "extra": {
        "laravel": {
            "dont-discover": []
        }
    },
    "config": {
        "optimize-autoloader": true,
        "preferred-install": "dist",
        "sort-packages": true,
        "allow-plugins": {
            "pestphp/pest-plugin": true,
            "php-http/discovery": true
        }
    },
    "minimum-stability": "stable",
    "prefer-stable": true
}

Any suggestions are very welcome - thank in advance.