▼テンプレート
[EC-CUBE] 4.0.0-rc　新規インストール
[レンタルサーバ] さくらVPS
[OS] Linux ik1-337-28664 4.15.0-38-generic #41-Ubuntu SMP Wed Oct 10 10:59:38 UTC 2018 x86_64
[PHP] 7.1.23-4+ubuntu18.04.1+deb.sury.org+1 (Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, session, standard, apache2handler, mysqlnd, PDO, xml, calendar, ctype, curl, dom, mbstring, fileinfo, ftp, gd, gettext, iconv, imagick, intl, json, exif, mcrypt, mysqli, pdo_mysql, Phar, posix, readline, recode, shmop, SimpleXML, sockets, sysvmsg, sysvsem, sysvshm, tidy, tokenizer, wddx, xmlreader, xmlrpc, xmlwriter, xsl, zip, Zend OPcache)

[データベース] MySQL 5.7.24-0ubuntu0.18.04.1
[WEBサーバ] Apache/2.4.29 (Ubuntu)
[ブラウザ] chrome
[導入プラグインの有無] 無
[カスタマイズの有無] 無
[現象] オーナーズストア、および管理画面のホームを開くと表示に２〜3分以上かかる。
オーナーズストアを開くと、「オーナーズストアとの通信に失敗しました。時間を置いてもう一度お試しください。」エラー表示がされる。ホームもおそらくこれが原因で表示がおそいのではないかと思っております。解決策わかるかたいらっしゃいますでしょうか。

sitelog:
[[2018-11-09 13:24:15] admin.INFO [N/A] [65b6ee6] [N/A] [Eccube\Log\Logger:log:64] - INIT [] [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:24:15] request.INFO [N/A] [65b6ee6] [N/A] [Symfony\Component\HttpKernel\EventListener\RouterListener:onKernelRequest:125] - Matched route "admin_store_plugin_owners_search". {"route":"admin_store_plugin_owners_search","route_parameters":{"_controller":"Eccube\\Controller\\Admin\\Store\\OwnerStoreController::search","_route":"admin_store_plugin_owners_search"},"request_uri":"https://siteurl/eccube_admin/store/plugin/api/search","method":"GET"} [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:24:15] admin.INFO [2t64q35lhir317hcn6uqnbi1jh] [65b6ee6] [1] [Eccube\Log\Logger:log:64] - PROCESS START ["admin_store_plugin_owners_search"] [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:24:15] php.INFO [2t64q35lhir317hcn6uqnbi1jh] [65b6ee6] [1] [Symfony\Component\Debug\ErrorHandler:handleError:523] - User Deprecated: The "Eccube\Repository\BaseInfoRepository" service is private, getting it from the container is deprecated since Symfony 3.2 and will fail in 4.0. You should either make the service public, or stop using the container directly and use dependency injection instead. {"exception":"[object] (ErrorException(code: 0): User Deprecated: The \"Eccube\\Repository\\BaseInfoRepository\" service is private, getting it from the container is deprecated since Symfony 3.2 and will fail in 4.0. You should either make the service public, or stop using the container directly and use dependency injection instead. at /var/www/html/store.tall-man.jp/vendor/symfony/dependency-injection/Container.php:282)"} [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:24:15] php.INFO [2t64q35lhir317hcn6uqnbi1jh] [65b6ee6] [1] [Symfony\Component\Debug\ErrorHandler:handleError:523] - User Deprecated: The "Eccube\Service\Composer\ComposerApiService" service is private, getting it from the container is deprecated since Symfony 3.2 and will fail in 4.0. You should either make the service public, or stop using the container directly and use dependency injection instead. {"exception":"[object] (ErrorException(code: 0): User Deprecated: The \"Eccube\\Service\\Composer\\ComposerApiService\" service is private, getting it from the container is deprecated since Symfony 3.2 and will fail in 4.0. You should either make the service public, or stop using the container directly and use dependency injection instead. at /var/www/html/store.tall-man.jp/vendor/symfony/dependency-injection/Container.php:282)"} [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:24:15] admin.INFO [2t64q35lhir317hcn6uqnbi1jh] [65b6ee6] [1] [Eccube\Log\Logger:log:64] - LOGIC START ["admin_store_plugin_owners_search"] [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:26:26] admin.INFO [2t64q35lhir317hcn6uqnbi1jh] [65b6ee6] [1] [Eccube\Log\Logger:log:64] - http get_info {"url":"https://beta-package-api.ec-cube.net/category","content_type":null,"http_code":0,"header_size":0,"request_size":0,"filetime":-1,"ssl_verify_result":0,"redirect_count":0,"total_time":130.519563,"namelookup_time":0.253344,"connect_time":0,"pretransfer_time":0,"size_upload":0,"size_download":0,"speed_download":0,"speed_upload":0,"download_content_length":-1,"upload_content_length":-1,"starttransfer_time":0,"redirect_time":0,"redirect_url":"","primary_ip":"","certinfo":[],"primary_port":0,"local_ip":"","local_port":0,"message":"Failed to connect to beta-package-api.ec-cube.net port 443: Connection timed out"} [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:28:37] admin.INFO [2t64q35lhir317hcn6uqnbi1jh] [65b6ee6] [1] [Eccube\Log\Logger:log:64] - http get_info {"url":"https://beta-package-api.ec-cube.net/plugins?price_type=all&page=1&per_page=50","content_type":null,"http_code":0,"header_size":0,"request_size":0,"filetime":-1,"ssl_verify_result":0,"redirect_count":0,"total_time":130.350018,"namelookup_time":0.004625,"connect_time":0,"pretransfer_time":0,"size_upload":0,"size_download":0,"speed_download":0,"speed_upload":0,"download_content_length":-1,"upload_content_length":-1,"starttransfer_time":0,"redirect_time":0,"redirect_url":"","primary_ip":"","certinfo":[],"primary_port":0,"local_ip":"","local_port":0,"message":"Failed to connect to beta-package-api.ec-cube.net port 443: Connection timed out"} [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:28:37] admin.INFO [2t64q35lhir317hcn6uqnbi1jh] [65b6ee6] [1] [Eccube\Log\Logger:log:64] - LOGIC END ["admin_store_plugin_owners_search"] [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]
[2018-11-09 13:28:37] app.INFO [N/A] [65b6ee6] [1] [Eccube\Log\Logger:log:68] - PROCESS END ["admin_store_plugin_owners_search"] [GET, /eccube_admin/store/plugin/api/search, 153.179.26.97, https://siteurl/eccube_admin/, Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36]

https://beta-package-api.ec-cube.net/

このURLが間違っているのが、原因と思われます。
なんでこのように設定されてしまうのか、よくわかっていませんが。
(たぶん、githubからcloneしたソースコードからインストールすると、なるのではと予想しています。)
以下のように修正するとなおるかもしれません。

１．app/config/eccube/packages/eccube.yaml
の13行目を以下のように修正。

env(ECCUBE_PACKAGE_API_URL): 'https://package-api.ec-cube.net'

２．.env ファイルに以下を記述する、

ECCUBE_PACKAGE_API_URL=https://package-api.ec-cube.net