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An error Template execution failed: ReferenceError: dev is not defined

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Html Webpack Plugin:
ReferenceError: dev is not defined

Index.html: 703
D:/WT/order/order_pay_admin/index. HTML: 703:2

Index.html: 710/node_modules/HTML - webpack - the plugin/lib/loader. The js! ../index. HTML. The module exports
D:/WT/order/order_pay_admin/index. HTML: 710:3

Index. Js: 264
[order_pay_admin]/[HTML - webpack - plugins]/index, js: 264:16

16 tryCatcher util. Js:
Order_pay_admin]/[bluebird/js/release/util. Js: shew forth

Promise. Js: 512 promise. _settlePromiseFromHandler
Order_pay_admin]/[bluebird/js/release/promise. Js: 512:31

Promise. Js: 569 promise. _settlePromise
Order_pay_admin]/[bluebird/js/release/promise. Js: 569:18

Promise. Js: 606 promise. _settlePromiseCtx
Order_pay_admin]/[bluebird/js/release/promise. Js: 606:10

142 _drainQueueStep async. Js:
Order_pay_admin]/[bluebird/js/release/async. Js: 142:12

131 _drainQueue async. Js:
Order_pay_admin]/[bluebird/js/release/async. Js: 131-9

Async. Js: 147 async. _drainQueues
Order_pay_admin]/[bluebird/js/release/async. Js: 147:

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