laravel composer update でのエラー

度々すみません...

composer　updateをEC2上にて行った際に、下記のエラーになりました。
原因がなかなかわからず詰まっております。。。。
ご教授いただければ幸いです。
宜しくお願い致します。

> Illuminate\Foundation\ComposerScripts::postAutoloadDump
> @php artisan package:discover

   Exception  : The /var/www/html/live/bootstrap/cache directory must be present and writable.

  at /var/www/html/live/vendor/laravel/framework/src/Illuminate/Foundation/PackageManifest.php:165
    161|      */
    162|     protected function write(array $manifest)
    163|     {
    164|         if (! is_writable(dirname($this->manifestPath))) {
  > 165|             throw new Exception('The '.dirname($this->manifestPath).' directory must be present and writable.');
    166|         }
    167| 
    168|         $this->files->put(
    169|             $this->manifestPath, '<?php return '.var_export($manifest, true).';'

  Exception trace:

  1   Illuminate\Foundation\PackageManifest::write()
      /var/www/html/live/vendor/laravel/framework/src/Illuminate/Foundation/PackageManifest.php:125

  2   Illuminate\Foundation\PackageManifest::build()
      /var/www/html/live/vendor/laravel/framework/src/Illuminate/Foundation/Console/PackageDiscoverCommand.php:32

  Please use the argument -v to see more details.
Script @php artisan package:discover handling the post-autoload-dump event returned with error code 1

localでは成功しています。
追加機能でLine認証などを入れたので（socialite）、updateを行いたいのですが。

追記

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": "^7.1.3",
        "doctrine/dbal": "^2.7",
        "fideloper/proxy": "^4.0",
        "laravel/framework": "5.6.*",
        "laravel/socialite": "^3.0",
        "laravel/tinker": "^1.0",
        "laravelcollective/html": "^5.6",
        "league/flysystem-aws-s3-v3": "~1.0",
        "socialiteproviders/line": "^2.0"
    },
    "require-dev": {
        "filp/whoops": "^2.0",
        "fzaninotto/faker": "^1.4",
        "mockery/mockery": "^1.0",
        "nunomaduro/collision": "^2.0",
        "phpunit/phpunit": "^7.0"
    },
    "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
    },
    "minimum-stability": "dev",
    "prefer-stable": true
}

試したこと

sudo chmod -R 775 bootstrap/cache/

php artisan cache:clear