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Hi @all, actually after upgrading from Magento 2.2.4 to Magento 2.3.4 below error is showing on checkout cart page.

enter image description here

After reaching to checkout cart page Ajax loader is just keep on moving and shipping rates are not loading due to below error in browser console.

Uncaught ReferenceError: Unable to process binding "if: function(){return isExcludingDisplayed() }" Message: Unable to process binding "if: function(){return haveToShowCoupon() }" Message: haveToShowCoupon is not defined at if (eval at createBindingsStringEvaluator (knockout.js:2982), <anonymous>:3:55) at ko.computed.disposeWhenNodeIsRemoved (knockout.js:4381) at Function.evaluateImmediate_CallReadThenEndDependencyDetection (knockout.js:2173) at Function.evaluateImmediate_CallReadWithDependencyDetection (knockout.js:2140) at Function.evaluateImmediate (knockout.js:2101) at Object.ko.computed.ko.dependentObservable (knockout.js:1954) at init (knockout.js:4380) at knockout.js:3358 at Object.ignore (knockout.js:1470) at knockout.js:3357

If anyone having an idea, please guide me. Thanks in Advance!!!.

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2 Answers 2

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The problem might be caused due to the incorrect value or no value available for the isExcludingDisplayed() and haveToShowCoupon() functions.

These two functions are available in shipping.js file

isExcludingDisplayed : module-tax/view/frontend/web/js/view/checkout/summary/shipping.js

haveToShowCoupon : module-checkout/view/frontend/web/js/view/summary/shipping.js

If you have customized the shipping js file then cross check the items with default(shipping.js) js file in magento 2.3.4 version

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The problem is due to file changes in Magento 2.3.4, if you have customized module-checkout/view/frontend/web/js/view/summary/shipping.js, please compare the files with the core file and add those changes in your custom "view/summary/shipping.js" file.

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