■ECCUBEバージョン
4.1.2-p1

■phpバージョン
7.4.33

■サーバー
エックスサーバー

■導入プラグイン
データ移行プラグイン（バージョン：4.1.0）
商品追加ポイント設定プラグイン for EC-CUBE 4（バージョン：1.2.1）
新規会員登録時ポイント付与プラグイン for EC-CUBE 4.0〜4.1（バージョン：2.0.1）
商品おすすめ順並び替えプラグイン for EC-CUBE4（バージョン：1.1.0）
商品レビュー管理プラグイン（バージョン：4.1.0）
おすすめ商品管理プラグイン（バージョン：4.1.0）
関連商品プラグイン（バージョン：4.1.0）
売上集計プラグイン（バージョン：4.1.0）
ソニーペイメントサービス決済プラグイン（バージョン：1.0.2）

■状況
ECCUBE4.1にてソニーペイメントサービス決済プラグイン1.0.2を使用中ですが、最新バージョン（1.0.4）へのアップデートが完了できません。

ソニーペイメントさんに問い合わせをしたところ、アップデートに関しては責任外となるので開発コミュニティで質問して欲しいとの回答をいただきました。

https://doc4.ec-cube.net/plugin_error
上記の内容を参考に、ソニーペイメント以外のプラグインを全て無効化し、管理画面でメンテナンスモードに切り替えることとSSHで/root/var/cache/*のキャッシュの削除を行ってみましたが状況は変わりませんでした。

アップデート画面でログとして表示されるのは下記の内容です。

[アップデート画面ログ]
**************** Disable ****************
**************** Upgrade ****************
[90.0MiB/1.62s] ./composer.json has been updated
[90.6MiB/1.96s] Running composer update ec-cube/slnpayment41 --with-dependencies
[93.5MiB/1.99s] Loading composer repositories with package information
[95.3MiB/3.02s] <warning>Dependency ec-cube/plugin-installer is also a root requirement. Package has not been listed as an update argument, so keeping locked at old version. Use --with-all-dependencies (-W) to include root dependencies.</warning>
[95.5MiB/3.05s] Updating dependencies
[96.6MiB/3.07s] Nothing to modify in lock file
[97.3MiB/3.11s] Installing dependencies from lock file
[98.0MiB/3.12s] Nothing to install, update or remove
[98.4MiB/3.15s] <warning>Package doctrine/doctrine-cache-bundle is abandoned, you should avoid using it. No replacement was suggested.</warning>
[98.4MiB/3.15s] <warning>Package doctrine/reflection is abandoned, you should avoid using it. Use roave/better-reflection instead.</warning>
[98.4MiB/3.15s] <warning>Package easycorp/easy-log-handler is abandoned, you should avoid using it. No replacement was suggested.</warning>
[98.4MiB/3.15s] <warning>Package setasign/fpdi-tcpdf is abandoned, you should avoid using it. No replacement was suggested.</warning>
[98.4MiB/3.15s] <warning>Package swiftmailer/swiftmailer is abandoned, you should avoid using it. Use symfony/mailer instead.</warning>
[98.4MiB/3.15s] <warning>Package symfony/inflector is abandoned, you should avoid using it. Use EnglishInflector from the String component instead.</warning>
[98.4MiB/3.15s] <warning>Package twig/extensions is abandoned, you should avoid using it. No replacement was suggested.</warning>
[98.4MiB/3.15s] <warning>Package fzaninotto/faker is abandoned, you should avoid using it. No replacement was suggested.</warning>
[98.4MiB/3.15s] <warning>Package phpunit/php-token-stream is abandoned, you should avoid using it. No replacement was suggested.</warning>
[98.4MiB/3.15s] Generating optimized autoload files
[116.6MiB/8.57s] <warning>Class Eccube\Entity\Product located in ./app/proxy/entity/src/Eccube/Entity/Product.php does not comply with psr-4 autoloading standard. Skipping.</warning>
[116.6MiB/8.57s] <warning>Class Eccube\Entity\Customer located in ./app/proxy/entity/src/Eccube/Entity/Customer.php does not comply with psr-4 autoloading standard. Skipping.</warning>
[116.6MiB/8.57s] <warning>Class Eccube\Entity\BaseInfo located in ./app/proxy/entity/src/Eccube/Entity/BaseInfo.php does not comply with psr-4 autoloading standard. Skipping.</warning>
[116.6MiB/8.57s] <warning>Class Eccube\Entity\Order located in ./app/proxy/entity/src/Eccube/Entity/Order.php does not comply with psr-4 autoloading standard. Skipping.</warning>
[116.6MiB/8.57s] <warning>Class Eccube\Entity\OrderItem located in ./app/proxy/entity/src/Eccube/Entity/OrderItem.php does not comply with psr-4 autoloading standard. Skipping.</warning>
[130.1MiB/9.83s] composer/package-versions-deprecated: Generating version class...
[130.1MiB/9.83s] composer/package-versions-deprecated: ...done generating version class
[130.1MiB/9.84s] Carbon 1 is deprecated, see how to migrate to Carbon 2.
[130.1MiB/9.84s] https://carbon.nesbot.com/docs/#api-carbon-2
[130.1MiB/9.84s] You can run './vendor/bin/upgrade-carbon' to get help in updating carbon and other frameworks and libraries that depend on it.
[112.8MiB/9.94s] 104 packages you are using are looking for funding.
[112.8MiB/9.94s] Use the `composer fund` command to find out more!
[113.4MiB/10.20s]
[113.4MiB/10.20s] Run composer recipes at any time to see the status of your Symfony recipes.
[113.4MiB/10.20s]
[113.5MiB/14.48s] Memory usage: 113.53MiB (peak: 150.67MiB), time: 14.48s

**************** Schema Update ****************
以下、500 Internal Server ErrorのHTMLの内容

ログの内容がいまいちよくわからず、アップデートが失敗する原因と対策でここを確認するといいという点があればご指摘いただければ幸いです。
よろしくお願いいたします。