▼テンプレート
[EC-CUBE] 4.2.0　新規インストール
[レンタルサーバ]　sakuraインターネット
[PHP] 8.1.29
[データベース] MySQL 8.0.40
[WEBサーバ] Apache
[ブラウザ] chrome
[導入プラグインの有無] メルマガプラグイン　のみ
[カスタマイズの有無] なし　ほぼEC-CUBEインストールしたままの状態　データも入れていません
[現象] EC-CUBE2.12から4.2.0へ移行したいのですが、データ移行プラグイン for EC-CUBE4.3を購入しインストールしようとしましたが、エラーが出てインストールできません。composerのインストールも済ませており、composer about コマンドでバージョン2.8.6と表示されますが、ちゃんと走ってないのでしょうか？
下記のエラーが出るのですが原因がよくわかりません。ご教授願える方がいらっしゃいましたら宜しくお願いいたします。

**************** DataMigration43 ****************
<warning>A script named compile would override a Composer command and has been skipped</warning>
<warning>A script named auto-scripts would override a Composer command and has been skipped</warning>
<warning>A script named installer-scripts would override a Composer command and has been skipped</warning>
[6.3MiB/4.49s] Using version ^4.3 for ec-cube/datamigration43
[6.4MiB/4.49s] ./composer.json has been updated
[7.8MiB/4.60s] Running composer update ec-cube/datamigration43 --with-dependencies
[10.8MiB/4.63s] Loading composer repositories with package information
[11.8MiB/8.83s] <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>
[12.2MiB/8.98s] Updating dependencies
[14.1MiB/9.02s] Your requirements could not be resolved to an installable set of packages.
[14.1MiB/9.02s]
Problem 1
- lcobucci/jwt 4.2.1 requires ext-sodium * -> it is missing from your system. Install or enable PHP's sodium extension.
- league/oauth2-server-bundle v0.3.0 requires league/oauth2-server ^8.3 -> satisfiable by league/oauth2-server[8.3.5].
- ec-cube/api42 4.2.3 requires league/oauth2-server-bundle ^0.3 -> satisfiable by league/oauth2-server-bundle[v0.3.0].
- league/oauth2-server 8.3.5 requires lcobucci/jwt ^3.4.6 || ^4.0.4 -> satisfiable by lcobucci/jwt[4.2.1].
- ec-cube/api42 is locked to version 4.2.3 and an update of this package was not requested.

To enable extensions, verify that they are enabled in your .ini files:
- /usr/local/php/8.1/etc/php.ini
- /usr/local/php/8.1/etc/conf.d/apcu.ini
- /usr/local/php/8.1/etc/conf.d/imagick.ini
- /usr/local/php/8.1/etc/conf.d/mcrypt.ini
- /usr/local/php/8.1/etc/conf.d/opcache.ini
- /home/***/.php.config/php.ini
You can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode.
Alternatively, you can run Composer with `--ignore-platform-req=ext-sodium` to temporarily ignore these required extensions.
[14.1MiB/9.02s] <warning>Running update with --no-dev does not mean require-dev is ignored, it just means the packages will not be installed. If dev requirements are blocking the update you have to resolve those problems.</warning>
[12.4MiB/9.02s] You can also try re-running composer require with an explicit version constraint, e.g. "composer require ec-cube/DataMigration43:*" to figure out if any version is installable, or "composer require ec-cube/DataMigration43:^2.1" if you know which you need.
[12.4MiB/9.02s]
Installation failed, reverting ./composer.json and ./composer.lock to their original content.
[12.4MiB/9.02s] Memory usage: 12.38MiB (peak: 14.47MiB), time: 9.02s

{"success":false,"log":"\u003Cwarning\u003EA script named compile would override a Composer command and has been skipped\u003C\/warning\u003E\n\u003Cwarning\u003EA script named auto-scripts would override a Composer command and has been skipped\u003C\/warning\u003E\n\u003Cwarning\u003EA script named installer-scripts would override a Composer command and has been skipped\u003C\/warning\u003E\n[6.3MiB\/4.49s] Using version ^4.3 for ec-cube\/datamigration43\n[6.4MiB\/4.49s] .\/composer.json has been updated\n[7.8MiB\/4.60s] Running composer update ec-cube\/datamigration43 --with-dependencies\n[10.8MiB\/4.63s] Loading composer repositories with package information\n[11.8MiB\/8.83s] \u003Cwarning\u003EDependency 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.\u003C\/warning\u003E\n[12.2MiB\/8.98s] Updating dependencies\n[14.1MiB\/9.02s] Your requirements could not be resolved to an installable set of packages.\n[14.1MiB\/9.02s] \n Problem 1\n - lcobucci\/jwt 4.2.1 requires ext-sodium * -\u003E it is missing from your system. Install or enable PHP\u0027s sodium extension.\n - league\/oauth2-server-bundle v0.3.0 requires league\/oauth2-server ^8.3 -\u003E satisfiable by league\/oauth2-server[8.3.5].\n - ec-cube\/api42 4.2.3 requires league\/oauth2-server-bundle ^0.3 -\u003E satisfiable by league\/oauth2-server-bundle[v0.3.0].\n - league\/oauth2-server 8.3.5 requires lcobucci\/jwt ^3.4.6 || ^4.0.4 -\u003E satisfiable by lcobucci\/jwt[4.2.1].\n - ec-cube\/api42 is locked to version 4.2.3 and an update of this package was not requested.\n\nTo enable extensions, verify that they are enabled in your .ini files:\n - \/usr\/local\/php\/8.1\/etc\/php.ini\n - \/usr\/local\/php\/8.1\/etc\/conf.d\/apcu.ini\n - \/usr\/local\/php\/8.1\/etc\/conf.d\/imagick.ini\n - \/usr\/local\/php\/8.1\/etc\/conf.d\/mcrypt.ini\n - \/usr\/local\/php\/8.1\/etc\/conf.d\/opcache.ini\n - \/home\/***\/.php.config\/php.ini\nYou can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode.\nAlternatively, you can run Composer with `--ignore-platform-req=ext-sodium` to temporarily ignore these required extensions.\n[14.1MiB\/9.02s] \u003Cwarning\u003ERunning update with --no-dev does not mean require-dev is ignored, it just means the packages will not be installed. If dev requirements are blocking the update you have to resolve those problems.\u003C\/warning\u003E\n[12.4MiB\/9.02s] You can also try re-running composer require with an explicit version constraint, e.g. \u0022composer require ec-cube\/DataMigration43:*\u0022 to figure out if any version is installable, or \u0022composer require ec-cube\/DataMigration43:^2.1\u0022 if you know which you need.\n[12.4MiB\/9.02s] \nInstallation failed, reverting .\/composer.json and .\/composer.lock to their original content.\n[12.4MiB\/9.02s] Memory usage: 12.38MiB (peak: 14.47MiB), time: 9.02s\n"}

とエラーメッセージされています。
公式ドキュメントにsodium拡張ライブラリのエラー時の対応が記載されています。
https://doc4.ec-cube.net/quickstart/trouble-shooting-for-plugin-install

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URL: https://miworks.biz/
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早速の回答ありがとうございます。

プラグイン一覧のwebapiプラグインをアンイストール
↓
やはり同じエラー
↓
webapiプラグイン再インストール(これはアンインストールせず)
↓
データ移行プラグインのインストール成功

という流れで無事インストールできました。
ありがとうございました。