Call to a member function access() on null in SortableViewsHandle.php

Problem/Motivation

In some cases, hard to explain when exaclty, this error is taking place:

Error: Call to a member function access() on null in Drupal\sortableviews\Plugin\views\field\SortableViewsHandle->render() (line 28 of /code/web/modules/contrib/sortableviews/src/Plugin/views/field/SortableViewsHandle.php).

Proposed resolution

Add a null check before calling access method.