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On upgrading to Magento 2.4.4 got this error on running setup:upgrade command

Class "Magento\Framework\Communication\Config\Reader\XmlReader" does not exist

This class is not used in any of the custom modules

The class is present in vendor/magento/framework/Communication/Config/Reader/XmlReader.php

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2 Answers 2

Reset to default
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I would firstly clear the generated folder, delete the vendor folder, run composer cc && composer install and then run setup:upgrade

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    Yupp...for some reason container-interop directory was missing inside vendor. So deleting the entire vendor directory and running composer install worked
    – GenZ Dev
    Jul 28, 2022 at 5:28
  • Any ideas why this would not work? I tried and same error. I have 2.4.5-p1.
    – Webninja
    Jan 13, 2023 at 19:47
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For me the solution was to download the 2.4.5-p1 version's original app/etc/di.xml file and copy that to my installation and then run setup:upgrade again.

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