連絡が遅れて申し訳ありません。
システムエラーが発生しました　はありませんが　

タダ　warning　多数発生しています
<warning>Stack trace:</warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/error-handler/DebugClassLoader.php:326</warning>
annotation to suppress this message. in
"Symfony\Flex\TruncatedComposerRepository" now to avoid errors or add an explicit @return
add "array" as a native return type declaration in the future. Do the same in child class
<warning>Deprecation Notice: Method "Composer\Repository\ComposerRepository::fetchFile()" might
<warning> /home/mirai-design3/www/Shopping_Japan/index.php:83</warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/http-kernel/Kernel.php:202</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/http-kernel/HttpKernel.php:75</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/http-kernel/HttpKernel.php:153</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Controller/Admin/Store/OwnerStoreController.php:232</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/var/cache/dev/Container3rehwY8/PluginService_e75fd88.php:197</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Service/PluginService.php:813</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/var/cache/dev/Container3rehwY8/ComposerApiService_c77e330.php:65</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Service/Composer/ComposerApiService.php:240</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Service/Composer/ComposerApiService.php:83</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Service/Composer/ComposerApiService.php:330</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Service/Composer/ComposerApiService.php:397</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Service/Composer/ComposerApiService.php:279</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/src/Eccube/Service/Composer/ComposerApiService.php:346</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Console/Application.php:138</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/console/Application.php:171</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Console/Application.php:343</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/console/Application.php:299</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/console/Application.php:1028</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/console/Command/Command.php:264</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Command/ConfigCommand.php:155</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Command/BaseCommand.php:231</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Command/BaseCommand.php:127</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Console/Application.php:471</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Factory.php:625</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Factory.php:439</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Plugin/PluginManager.php:101</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Plugin/PluginManager.php:472</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Plugin/PluginManager.php:293</warning>
<warning>
/home/mirai-design3/www/Shopping_Japan/vendor/composer/composer/src/Composer/Plugin/PluginManager.php:393</warning>
<warning>
<warning> /home/mirai-design3/www/Shopping_Japan/vendor/symfony/flex/src/Flex.php:120</warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/error-handler/DebugClassLoader.php:296</warning>
<warning>
<warning>Stack trace:</warning>
/home/mirai-design3/www/Shopping_Japan/vendor/symfony/error-handler/DebugClassLoader.php:326</warning>

よろしくお願いします