Libraries which containing the PHP class InstallConfig

Solve: PHP Fatal error: Uncaught Error: Class "InstallConfig" not found

Markocupic\GalleryCreatorBundle\InstallConfig

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This class belongs to the vendor Markocupic and the package Gallery-creator-bundle

app\install\validate\InstallConfig

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This class belongs to the vendor Jackcnn and the package Eacoophp

Yireo\IntegrationTestHelper\Utilities\IntegrationTesting\InstallConfig

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This class belongs to the vendor Yireo and the package Magento2-integration-test-helper

package\kernel\installConfig

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This class belongs to the vendor Mastertang and the package Package

Magento\Elasticsearch\Setup\InstallConfig

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This class belongs to the vendor Magenxcommerce and the package Module-elasticsearch

Yireo\IntegrationTestHelper\Utilities\InstallConfig

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This class belongs to the vendor Yireo and the package Magento2-integration-test-helper