Issue#3432315: Resolve PHP errors on config sync.

Related to #3432315

src/EventSubscriber/ConfigIgnoreEventSubscriber.php

@@ -133,6 +133,10 @@ class ConfigIgnoreEventSubscriber implements EventSubscriberInterface, CacheTags
 
     // Get the config ignore settings form the transformation storage.
     $transformation_storage = $transformation_storage->createCollection(StorageInterface::DEFAULT_COLLECTION);
+    if (empty($transformation_storage->listAll())) {
+      // Do not ignore anything if the transformation storage is empty in the default collection.
+      return;
+    }
     if ($transformation_storage->exists('config_ignore.settings')) {
       try {
         // This can be used to hook into config ignore via an event subscriber