環境

PHP 7.4
Magento 2.4

エラー

1 exception(s):
Exception #0 (Magento\Framework\Exception\LocalizedException): The configuration file has changed. Run the "app:config:import" or the "setup:upgrade" command to synchronize the configuration.

Exception #0 (Magento\Framework\Exception\LocalizedException): The configuration file has changed. Run the "app:config:import" or the "setup:upgrade" command to synchronize the configuration.
<pre>#1 Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/fastly/magento2/Model/FrontControllerPlugin.php:131]
#2 Fastly\Cdn\Model\FrontControllerPlugin->aroundDispatch() called at [vendor/magento/framework/Interception/Interceptor.php:135]
#3 Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/module-page-cache/Model/App/FrontController/BuiltinPlugin.php:75]
#4 Magento\PageCache\Model\App\FrontController\BuiltinPlugin->aroundDispatch() called at [vendor/magento/framework/Interception/Interceptor.php:135]
#5 Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}() called at [vendor/magento/framework/Interception/Interceptor.php:153]
#6 Magento\Framework\App\FrontController\Interceptor->___callPlugins() called at [generated/code/Magento/Framework/App/FrontController/Interceptor.php:23]
#7 Magento\Framework\App\FrontController\Interceptor->dispatch() called at [vendor/magento/framework/App/Http.php:116]
#8 Magento\Framework\App\Http->launch() called at [generated/code/Magento/Framework/App/Http/Interceptor.php:23]
#9 Magento\Framework\App\Http\Interceptor->launch() called at [vendor/magento/framework/App/Bootstrap.php:263]
#10 Magento\Framework\App\Bootstrap->run() called at [pub/index.php:29]
</pre>

原因

app/etc/config.php ファイルを更新したときに発生するエラーです。
設定内容をデータベースに反映する必要があります。

対策

$ bin/magento app:config:import

参考

https://magento.stackexchange.com/questions/208860/unable-to-synchronized-app-import-configuration-failed