Fatal error: Class 'EasyBreadcrumbConstants' not found

Hi,

I'm installing the module but always get an error:

Fatal error: Class 'EasyBreadcrumbConstants' not found in modules/easy_breadcrumb/easy_breadcrumb.module on line 29. We fixed by changing function easy_breadcrumb_init() to:

function easy_breadcrumb_init() {
+ require_once 'includes/EasyBreadcrumbConstants.inc';
$disable_drupal_default_breadcrumb = variable_get(EasyBreadcrumbConstants::DB_VAR_DISABLE_DEFAULT_DRUPAL_BREADCRUMB, TRUE);
if ($disable_drupal_default_breadcrumb) {
// Sets the Drupal's default breadcrumb as an empty array to disable it.
drupal_set_breadcrumb(array());
}
}