Issue #3333974 by Berdir, Charchil Khandelwal, herved: Stop using $error->arrayPropertyPath

src/Plugin/Field/FieldWidget/ParagraphsWidget.php

@@ -2558,7 +2558,9 @@ class ParagraphsWidget extends WidgetBase {
   public function errorElement(array $element, ConstraintViolationInterface $error, array $form, FormStateInterface $form_state) {
     // Validation errors might be a about a specific (behavior) form element
     // attempt to find a matching element.
-    if (!empty($error->arrayPropertyPath) && $sub_element = NestedArray::getValue($element, $error->arrayPropertyPath)) {
+    $property_path_array = explode('.', $error->getPropertyPath());
+    array_shift($property_path_array);
+    if (!empty($property_path_array) && $sub_element = NestedArray::getValue($element, $property_path_array)) {
       return $sub_element;
     }
     return $element;