Magento does not send an email about a refunded grouped product

[atwixfirster]

Preconditions (*)

1. Create an order with a grouped product
2. Create an invoice for your order

Steps to reproduce (*)

1. Create a Credit Memo for your order and check "Email Copy of Credit Memo" option
2. Press "Refund Offline" button

Expected result (*)

1. Email is sent to customer

Actual result (*)

PHP error:

Fatal error: Uncaught TypeError: Argument 1 passed to Magento\Sales\Block\Order\Email\Items\Order\DefaultOrder::getItemPrice() must be an instance of Magento\Sales\Model\Order\Item, instance of Magento\Sales\Model\Order\Creditmemo\Item given, called in /home/dev/sites/magento2/app/code/Magento/Sales/view/frontend/templates/email/items/creditmemo/default.phtml on line 32 and defined in /home/dev/sites/magento2/app/code/Magento/Sales/Block/Order/Email/Items/Order/DefaultOrder.php:99 Stack trace: #0 /home/dev/sites/magento2/app/code/Magento/Sales/view/frontend/templates/email/items/creditmemo/default.phtml(32): Magento\Sales\Block\Order\Email\Items\Order\DefaultOrder->getItemPrice(Object(Magento\Sales\Model\Order\Creditmemo\Item)) #1 /home/dev/sites/magento2/lib/internal/Magento/Framework/View/TemplateEngine/Php.php(75): include('/home/dev/sites...') #2 /home/dev/sites/magento2/lib/internal/Magento/Framework/View/Element/Template.php(272): Magento\Framework\View\TemplateEngine\Php->render(Object(Magento\Groupe in /home/dev/sites/magento2/app/code/Magento/Sales/Block/Order/Email/Items/Order/DefaultOrder.php on line 99

[m2-assistant]

Hi @atwixfirster. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, please, review the Magento Contributor Assistant documentation.

@atwixfirster do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

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[m2-assistant]

Hi @atwixfirster. Thank you for working on this issue.
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[m2-assistant]

Hi @dmytro-ch. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).

  Details

  If the issue has a valid description, the label Issue: Format is valid will be added to the issue automatically. Please, edit issue description if needed, until label Issue: Format is valid appears.

• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue. If the report is valid, add Issue: Clear Description label to the issue by yourself.

• 3. Add Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 4. Verify that the issue is reproducible on 2.4-develop branch

  Details

  - Add the comment @magento give me 2.4-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.4-develop branch, please, add the label Reproduced on 2.4.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

• 5. Add label Issue: Confirmed once verification is complete.

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[magento-engcom-team]

✅ Confirmed by @dmytro-ch
Thank you for verifying the issue. Based on the provided information internal tickets MC-30185 were created

Issue Available: @dmytro-ch, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.