▼テンプレート
[EC-CUBE]4.0.6-p1
[レンタルサーバ]CPI
[PHP]7.3

上記の環境で管理画面から有料のプラグインをインストールしようとしたところ500エラーが発生してインストールできない状態が続いております。
無料のプラグインは問題なくインストールできるのですが、有料プラグイン（6つほど購入）が軒並みインストールできません。

認証キーも問題なく設定しているのと、コマンドからインストールを試みたのですが、そちらもできませんでした。


インストール時に以下のようなエラーメッセージが出ます。

Changed CWD to /usr/home/html/shop
Reading ./composer.json
Loading config file ./composer.json
Executing command (/usr/home/html/shop): git branch --no-color --no-abbrev -v
Executing command (/usr/home/html/shop): git describe --exact-match --tags
Executing command (/usr/home/html/shop): git log --pretty="%H" -n1 HEAD
Executing command (/usr/home/html/shop): hg branch
Executing command (/usr/home/html/shop): fossil branch list
Executing command (/usr/home/html/shop): fossil tag list
Executing command (/usr/home/html/shop): svn info --xml

Failed to initialize global composer: Composer could not find the config file: /usr/home/html/shop/app/Plugin/.composer/composer.json
To initialize a project, please create a composer.json file as described in the https://getcomposer.org/ "Getting Started" section
Reading /usr/home/html/shop/vendor/composer/installed.json
Loading plugin Symfony\Flex\Flex_composer_tmp0
Loading plugin UpdateHelper\ComposerPlugin_composer_tmp1
Loading plugin Eccube\Composer\EccubePluginInstallerPlugin_composer_tmp2
Loading plugin PackageVersions\Installer_composer_tmp3
Running 1.9.1 (2019-11-01 17:20:17) with PHP 7.2.34 on FreeBSD / 11.4-RELEASE-p9
Downloading https://package-api.ec-cube.net/packages.json
Retrying download: SSL certificate problem: certificate has expired
Downloading https://package-api.ec-cube.net/packages.json
Retrying download: SSL certificate problem: certificate has expired
Downloading https://package-api.ec-cube.net/packages.json
Retrying download: SSL certificate problem: certificate has expired
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---package-api.ec-cube.net/packages.json from cache
<warning>The "https://package-api.ec-cube.net/packages.json" file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed</warning>
<warning>https://package-api.ec-cube.net could not be fully loaded, package information was loaded from the local cache and may be out of date</warning>
Downloading https://repo.packagist.org/packages.json
<warning>Warning from https://repo.packagist.org: Support for Composer 1 is deprecated and some packages will not be available. You should upgrade to Composer 2. See https://blog.packagist.com/deprecating-composer-1-support/</warning>
Writing /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/packages.json into cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2013.json from cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2014.json from cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2015.json from cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2016.json from cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2017.json from cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2018.json from cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2019.json from cache
Downloading http://repo.packagist.org/p/provider-2020%240d3a1cfa8f88444b6509d639e8e257f0eb831353ab0b0458c54954b2667988c0.json
Writing /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2020.json into cache
Downloading http://repo.packagist.org/p/provider-2021-01%245eeb352ea6dff92413e380f4526d15bbed6c6c2c9dd1fa568e74450226cd1853.json
Writing /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2021-01.json into cache
Downloading http://repo.packagist.org/p/provider-2021-04%24d8b7aeb6a9eb2502a3d14d1e88119612cf20ed3bab76bad738be5412856e3ccb.json
Writing /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2021-04.json into cache
Downloading http://repo.packagist.org/p/provider-2021-07%24ccd533f4d38acfb6861d38e9304b7ba14f45c3f72a5c340af0f07d4ee8082a7c.json
Writing /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-2021-07.json into cache
Reading /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-archived.json from cache
Downloading http://repo.packagist.org/p/provider-latest%24ae7b726c83dfc687d754e8261add38c345cbf990518de58409c77c2230094598.json
Writing /usr/home/html/shop/app/Plugin/.composer/cache/repo/https---repo.packagist.org/p-provider-latest.json into cache
Package ec-cube/SheebDlc4 not found in /usr/home//html/shop/composer.json

原因がわからないのですが、おわかりになりますでしょうか？