diff --git a/core/modules/locale/src/LocaleConfigManager.php b/core/modules/locale/src/LocaleConfigManager.php
index aee2d59..98cf4dc 100644
--- a/core/modules/locale/src/LocaleConfigManager.php
+++ b/core/modules/locale/src/LocaleConfigManager.php
@@ -104,22 +104,25 @@ public function __construct(StorageInterface $config_storage, StorageInterface $
    * @param string $name
    *   Configuration object name.
    *
-   * @return \Drupal\locale\LocaleTypedConfig
-   *   Locale-wrapped configuration element.
+   * @return null|\Drupal\locale\LocaleTypedConfig
+   *   Locale-wrapped configuration element if the default configuration and
+   *   active configuration both existed for $name. NULL otherwise.
    */
   public function get($name) {
     // Read default and current configuration data.
     $default = $this->installStorageRead($name);
     $updated = $this->configStorage->read($name);
-    // We get only the data that didn't change from default.
-    $data = $this->compareConfigData($default, $updated);
-    $definition = $this->typedConfigManager->getDefinition($name);
-    $data_definition = $this->typedConfigManager->buildDataDefinition($definition, $data);
-    // Unless the configuration has a explicit language code we assume English.
-    $langcode = isset($default['langcode']) ? $default['langcode'] : 'en';
-    $wrapper = new LocaleTypedConfig($data_definition, $name, $langcode, $this, $this->typedConfigManager, $this->languageManager);
-    $wrapper->setValue($data);
-    return $wrapper;
+    if (is_array($default) && is_array($updated)) {
+      // We get only the data that didn't change from default.
+      $data = $this->compareConfigData($default, $updated);
+      $definition = $this->typedConfigManager->getDefinition($name);
+      $data_definition = $this->typedConfigManager->buildDataDefinition($definition, $data);
+      // Unless the configuration has a explicit language code we assume English.
+      $langcode = isset($default['langcode']) ? $default['langcode'] : 'en';
+      $wrapper = new LocaleTypedConfig($data_definition, $name, $langcode, $this, $this->typedConfigManager, $this->languageManager);
+      $wrapper->setValue($data);
+      return $wrapper;
+    }
   }
 
   /**