Declaration of Drupal\nouislider_better_exposed_filters\Plugin\better_exposed_filters\filter\nouislider::buildConfigurationForm

Problem/Motivation

I get this error

PHP message: PHP Fatal error:  Declaration of Drupal\nouislider_better_exposed_filters\Plugin\better_exposed_filters\filter\nouislider::buildConfigurationForm(array $form, Drupal\Core\Form\FormStateInterface $form_state) must be compatible with Drupal\better_exposed_filters\Plugin\better_exposed_filters\filter\FilterWidgetBase::buildConfigurationForm(array $form, Drupal\Core\Form\FormStateInterface $form_state): array in /var/www/html/web/modules/contrib/nouislider_better_exposed_filters/src/Plugin/better_exposed_filters/filter/nouislider.php on line 103"

Change row 103

public function buildConfigurationForm(array $form, FormStateInterface $form_state) {

with

public function buildConfigurationForm(array $form, FormStateInterface $form_state):array {