LARAVEL ON LNMP - Ваши требования не могут быть разрешены для устанавливаемого набора пакетов

Question

Прежде чем задать вам этот вопрос, я искал другие подобные вопросы, но ни один не представляет такую ​​же проблему.

Мой сервер настроен с LNMP (linux, nginx, mariadb, php-fpm)

Я получаю сообщение об ошибке после composer install:

Ваши требования не могут быть разрешены для устанавливаемого набора пакетов

Мой composer.json:

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=7.0.0",
        "caouecs/laravel-lang": "~3.0",
        "fideloper/proxy": "~3.3",
        "laravel/framework": "5.5.*",
        "laravel/tinker": "~1.0",
        "laravelcollective/html": "~5.0",
        "spatie/laravel-sitemap": "4.0",
        "unisharp/laravel-filemanager": "dev-master",
        "wilgucki/csv": "^1.0",
        "yajra/laravel-datatables-oracle": "~8.0"
    },
    "require-dev": {
        "filp/whoops": "~2.0",
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "~1.0",
        "phpunit/phpunit": "~6.0",
        "symfony/thanks": "^1.0"
    },
    "autoload": {
        "classmap": [
            "database/seeds",
            "database/factories"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "extra": {
        "laravel": {
            "dont-discover": [
            ]
        }
    },
    "scripts": {
        "post-root-package-install": [
            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "@php artisan key:generate"
        ],
        "post-autoload-dump": [
            "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
            "@php artisan package:discover"
        ]
    },
    "config": {
        "preferred-install": "dist",
        "sort-packages": true,
        "optimize-autoloader": true
    }
}

Это ошибка, которая появляется:

[root@vps566248]# composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for unisharp/laravel-filemanager dev-master -> satisfiable by unisharp/laravel-filemanager[dev-master].
    - unisharp/laravel-filemanager dev-master requires ext-exif * -> the requested PHP extension exif is missing from your system.

  To enable extensions, verify that they are enabled in your .ini files:
    - /usr/local/php/etc/php.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.