After install module null array in the settings form

When module installed. In the page /admin/config/content/nodeviewcount
has the errors:

Warning: in_array() expects parameter 2 to be array, null given in Drupal\nodeviewcount\Form\NodeViewCountSettingsForm->getRoleNamesOptions() (line 205 of modules/contrib/nodeviewcount/src/Form/NodeViewCountSettingsForm.php).
Warning: Invalid argument supplied for foreach() in Drupal\Core\Render\Element\Checkboxes::valueCallback() (line 100 of core/lib/Drupal/Core/Render/Element/Checkboxes.php).