Null coalescing operator breaks PHP 5 compatibility since 14.0

The code has compatibility issues with PHP 5.6 since version 14.0. You need to make some adjustments to resolve these issues. These are all issues found by the PHPCompatibility standard for the PHP Code Sniffer:

in includes/admin/templates/pages/pages.php
change
<td style="text-align: left;"><?php echo esc_attr($i + ($perPage * ($currentPage - 1 ?? 0))); ?></td>
to
<td style="text-align: left;"><?php echo esc_attr($i + ($perPage * ( (isset($currentPage) && !is_null($currentPage)) ? $currentPage - 1 : 0))); ?></td>



in includes/admin/pages/class-wp-statistics-admin-page-pages.php
change
$objectTitle = $object->labels->name ?? 'Pages';
to
$objectTitle = (isset($object->labels->name) && !is_null($object->labels->name)) ? $object->labels->name : 'Pages';
and
change
$title          = $object->labels->singular_name ?? '-';
to
$title          = ( isset($object->labels->singular_name) && !is_null($object->labels->singular_name) ) ? $object->labels->singular_name : '-';