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I am having this issue after updating Magento from 2.3 to 2.3.2

Fatal error:

Declaration of Magento\QuoteGraphQl\Model\Cart\SetShippingAddressOnCart::execute(Magento\Framework\GraphQl\Query\Resolver\ContextInterface $context, Magento\Quote\Api\Data\CartInterface $cart, array $shippingAddresses):

void must be compatible with Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCartInterface::execute(Magento\GraphQl\Model\Query\ContextInterface $context, Magento\Quote\Api\Data\CartInterface $cart, array $shippingAddressesInput):

void in /my/folder/public_html/app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressOnCart.php on line 20

I can't figure out even what it mean.

Is it from third-party module conflict or Magento native?

Any help please?

  • Why don't you install Magento via Composer? – zhartaunik Oct 4 '19 at 5:40
  • It means that the implementation of the interface has a different return type than the return type specified in the interface – vitoriodachef Oct 4 '19 at 5:41
  • @vitoriodachef how can I fix it please? – G. G. Oct 4 '19 at 7:11
  • I suppose you're trying to update from 2.3.0? You should try updating to 2.3.1 first and then to 2.3.2. Hopefully this helps. – Arno Vande Cappelle Oct 4 '19 at 7:18
  • @ArnoVandeCappelle I tried that already but from 2.3.1 to 2.3.2 I have same issue – G. G. Oct 4 '19 at 7:19
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Backup and delete the file /vendor/magento/module-quote-graph-ql/Model/Cart/SetShippingAddressOnCart.php

  • Actually it needs to remove all these:/module-quote-graph-ql/Model/Cart/ExtractDataFromAddress.php - /module-quote-graph-ql/Model/Cart/ExtractDataFromCart.php - /module-quote-graph-ql/Model/Cart/GetCustomerAddress.php - /module-quote-graph-ql/Model/Cart/SetShippingAddressOnCart.php - /module-quote-graph-ql/Model/Cart/SetShippingMethodOnCart.php - /module-quote-graph-ql/Model/Resolver/Cart/CreateEmptyCart.php – G. G. Oct 26 '19 at 23:10
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Where did you get the code from? This error should not happen. If you compare your /my/folder/public_html/app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressOnCart.php file with the M2 one on github you will see some difrence.

  • From github. I checked the file you mentioned but no luck. Now the error goes to line 15 of /my/folder/public_html/app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressOnCart.php – G. G. Oct 4 '19 at 7:44
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    I think you should and try to copy the github repo again (the 2.3 branch). Looks like some files have a different version. And also you should use Composer to avoid stuf like this. – Arno Vande Cappelle Oct 4 '19 at 7:54

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