Fix TypeError: Argument 1 passed to Drupal\Core\Entity\EntityStorageBase::loadMultiple() must be of the type array or null, string given.

This error occurs if ?asset=X is used instead of ?asset[]=X.
We can take a more defensive approach by automatically
wrapping the input in an array if it isn't already one.

modules/core/log/farm_log.module

@@ -61,6 +61,11 @@ function farm_log_entity_prepare_form(EntityInterface $entity, $operation, FormS
     /** @var \Drupal\Core\Field\EntityReferenceFieldItemList $asset_field */
     $asset_field = $entity->get('asset');
 
+    // Wrap in an array, if necessary.
+    if (!is_array($asset_ids)) {
+      $asset_ids = [$asset_ids];
+    }
+
     // Add each asset the user has view access to.
     $assets = \Drupal::entityTypeManager()->getStorage('asset')->loadMultiple($asset_ids);
     foreach ($assets as $asset) {