diff --git a/claro.theme b/claro.theme
index 942196c..5d95d3c 100644
--- a/claro.theme
+++ b/claro.theme
@@ -450,35 +450,38 @@ function claro_form_view_edit_form_alter(&$form, FormStateInterface $form_state)
     //
     // @todo: revisit after https://www.drupal.org/node/3057577 is fixed.
     $dummy_dropbutton = &$form['displays']['settings']['settings_content']['tab_content']['details']['top']['actions'];
-    $child_keys = Element::children($dummy_dropbutton);
-    $prefix_regex = '/(<.*class\s*= *["\']?)([^"\']*)(.*)/i';
-    $child_count = 0;
 
-    foreach ($child_keys as $key) {
-      if (in_array($key, ['prefix', 'suffix'])) {
-        continue;
-      }
-      $nested_child_keys = Element::children($dummy_dropbutton[$key], TRUE);
+    if ($dummy_dropbutton) {
+      $child_keys = Element::children($dummy_dropbutton);
+      $prefix_regex = '/(<.*class\s*= *["\']?)([^"\']*)(.*)/i';
+      $child_count = 0;
+
+      foreach ($child_keys as $key) {
+        if (in_array($key, ['prefix', 'suffix'])) {
+          continue;
+        }
+        $nested_child_keys = Element::children($dummy_dropbutton[$key], TRUE);
 
-      if (!empty($nested_child_keys)) {
-        foreach ($nested_child_keys as $nested_key) {
+        if (!empty($nested_child_keys)) {
+          foreach ($nested_child_keys as $nested_key) {
+            $child_count++;
+            $prefix = $dummy_dropbutton[$key][$nested_key]['#prefix'];
+            $dummy_dropbutton[$key][$nested_key]['#prefix'] = preg_replace($prefix_regex, '$1$2 dropbutton__item dropbutton__item--extrasmall$3', $prefix);
+          }
+        }
+        else {
           $child_count++;
-          $prefix = $dummy_dropbutton[$key][$nested_key]['#prefix'];
-          $dummy_dropbutton[$key][$nested_key]['#prefix'] = preg_replace($prefix_regex, '$1$2 dropbutton__item dropbutton__item--extrasmall$3', $prefix);
+          $prefix = $dummy_dropbutton[$key]['#prefix'];
+          $dummy_dropbutton[$key]['#prefix'] = preg_replace($prefix_regex, '$1$2 dropbutton__item dropbutton__item--extrasmall$3', $prefix);
         }
       }
-      else {
-        $child_count++;
-        $prefix = $dummy_dropbutton[$key]['#prefix'];
-        $dummy_dropbutton[$key]['#prefix'] = preg_replace($prefix_regex, '$1$2 dropbutton__item dropbutton__item--extrasmall$3', $prefix);
-      }
-    }
 
-    if (!empty($dummy_dropbutton['prefix']) && !empty($dummy_dropbutton['prefix']['#markup'])) {
-      $classes = 'dropbutton--extrasmall ';
-      $classes .= ($child_count > 1) ? 'dropbutton--multiple' : 'dropbutton--single';
-      $prefix = $dummy_dropbutton['prefix']['#markup'];
-      $dummy_dropbutton['prefix']['#markup'] = preg_replace($prefix_regex, '$1$2 ' . $classes . '$3', $prefix);
+      if (!empty($dummy_dropbutton['prefix']) && !empty($dummy_dropbutton['prefix']['#markup'])) {
+        $classes = 'dropbutton--extrasmall ';
+        $classes .= ($child_count > 1) ? 'dropbutton--multiple' : 'dropbutton--single';
+        $prefix = $dummy_dropbutton['prefix']['#markup'];
+        $dummy_dropbutton['prefix']['#markup'] = preg_replace($prefix_regex, '$1$2 ' . $classes . '$3', $prefix);
+      }
     }
   }
 }