■エラーを解決したいです
▼テンプレート
[EC-CUBE]　3.0.17
[レンタルサーバ]　AWS
[OS]　Windows10
[PHP]　7.2.11
[データベース] MySQL 5.7.24
[WEBサーバ]　Apache 2.4.34
[ブラウザ]　Chrome最新
[教えてほしい点]

「受注ステータス一括登録プラグイン」をインストールしました。
そこから使用しようとしてみましたが、【受注ステータスを更新】ボタンを押すと、「システムエラーが発生しました」と表示されます。
ログには下記の様な記述がありました。



[2019-06-14 14:03:48,217325] eccube.INFO [1896f512] [4b4b67a4] [3] [LogListener:logResponse:96] - < 200 [GET, /ric7ed8t9ufb/, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order/change_status, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:48,017287] eccube.INFO [1896f512] [4b4b67a4] [3] [LogListener:logRequest:83] - > GET /ric7ed8t9ufb/ [GET, /ric7ed8t9ufb/, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order/change_status, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:48,004217] eccube.INFO [NULL] [4b4b67a4] [NULL] [RouterListener:onKernelRequest:146] - Matched route "admin_homepage". {"route_parameters":{"_controller":"\\Eccube\\Controller\\Admin\\AdminController::index","_route":"admin_homepage"},"request_uri":"https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/"} [GET, /ric7ed8t9ufb/, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order/change_status, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:38,212932] eccube.INFO [1896f512] [644e997d] [3] [LogListener:logResponse:96] - < 200 [GET, /ric7ed8t9ufb/order/change_status, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:38,108953] eccube.INFO [1896f512] [644e997d] [3] [LogListener:logRequest:83] - > GET /ric7ed8t9ufb/order/change_status [GET, /ric7ed8t9ufb/order/change_status, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:38,096050] eccube.INFO [NULL] [644e997d] [NULL] [RouterListener:onKernelRequest:146] - Matched route "admin_order_chgstatus". {"route_parameters":{"_controller":"\\Plugin\\ChgOrderStatus\\Controller\\ChgOrderStatusController::change_status","_route":"admin_order_chgstatus"},"request_uri":"https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order/change_status"} [GET, /ric7ed8t9ufb/order/change_status, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:34,457762] eccube.INFO [1896f512] [b5e06821] [3] [LogListener:logResponse:96] - < 200 [POST, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:34,190997] eccube.INFO [1896f512] [b5e06821] [3] [LogListener:logRequest:83] - > POST /ric7ed8t9ufb/order [POST, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:34,178547] eccube.INFO [NULL] [b5e06821] [NULL] [RouterListener:onKernelRequest:146] - Matched route "admin_order". {"route_parameters":{"_controller":"\\Eccube\\Controller\\Admin\\Order\\OrderController::index","_route":"admin_order"},"request_uri":"https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order"} [POST, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:32,306291] eccube.INFO [1896f512] [7e6de619] [3] [LogListener:logResponse:96] - < 200 [GET, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:32,117883] eccube.INFO [1896f512] [7e6de619] [3] [LogListener:logRequest:83] - > GET /ric7ed8t9ufb/order [GET, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:32,104884] eccube.INFO [NULL] [7e6de619] [NULL] [RouterListener:onKernelRequest:146] - Matched route "admin_order". {"route_parameters":{"_controller":"\\Eccube\\Controller\\Admin\\Order\\OrderController::index","_route":"admin_order"},"request_uri":"https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order"} [GET, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:27,106094] eccube.INFO [1896f512] [1eb66380] [3] [LogListener:logResponse:96] - < 200 [POST, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:26,837913] eccube.INFO [1896f512] [1eb66380] [3] [LogListener:logRequest:83] - > POST /ric7ed8t9ufb/order [POST, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]
[2019-06-14 14:03:26,825246] eccube.INFO [NULL] [1eb66380] [NULL] [RouterListener:onKernelRequest:146] - Matched route "admin_order". {"route_parameters":{"_controller":"\\Eccube\\Controller\\Admin\\Order\\OrderController::index","_route":"admin_order"},"request_uri":"https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order"} [POST, /ric7ed8t9ufb/order, 223.133.33.59, https://haruka-ed.fundation.co.jp/ric7ed8t9ufb/order, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36]



ちなみにデバッグだと下記のエラーが出ております。
FatalErrorException in ChgOrderStatusRepository.php line 21:
Error: Call to a member function setOrderStatus() on null


ステータスの値が取れていないのでしょうか。


何が原因でエラーが出ているのかわかる方がおりましたらご教授頂けますと幸いです。

何卒よろしくお願いいたします。