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The following error might display at the start of your upgrade:

See one of the following sections for possible solutions:

• Problem: you’re not authenticated
• Problem: the updater application isn’t initialized
• Problem: you cloned the Magento GitHub repository

Problem: you’re not authenticated

You might not have entered your authentication keys in the Magento Admin.

Solution

Enter your authentication keys in the Admin. Try your upgrade again.

If that doesn’t work, try generating new authentication keys and enter those in the Admin. Then try your upgrade again.

Problem: the updater application isn’t initialized

In some cases (especially if you downloaded the Magento software from packagist), the updater application might not be initialized. (A common way for this to happen is to not specify our https://repo.magento.com repository in the composer create-project command.)

The updater application uses a cron job to run the upgrade; if it’s not initialized, your update fails.

Solution

Modify Magento’s composer.json to reference the https://repo.magento.com repository and run composer install in the updater’s root directory to resolve dependencies and initialize it as follows:

1. Log in to your Magento server as the Magento file system owner.
2. Change to your Magento installation directory.

3. Back up your existing composer.json:

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   cp composer.json composer.json.bak
   

4. Open composer.json in a text editor.

5. To the repositories section, add the following:

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   {
       "type": "composer",
       "url": "https://repo.magento.com/",
   }
   

   Example:

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   "repositories": [
        {
          "type": "composer",
          "url": "https://repo.magento.com/"
        }
   ]
   

6. Save your changes to composer.json and exit the text editor.
7. Change to the update subdirectory, where the updater is located.

8. Enter the following command:

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   composer install
   

9. After the command completes, try the upgrade again.

You cloned the Magento GitHub repository

If you installed the Magento software by cloning the Magento repository, you cannot use the System Upgrade utility to upgrade it.

Instead, see one of the options discussed in Contributing developers—update, reinstall Magento.