Issue #3303048 by tim-diels: Allow multiple contextual filters is broken

      foreach ($config['contextual_filter'] as $values) {

        if ($values['enabled']) {

          // Contextual filters can have multiple values.

          if (is_array($values['value'])) {

            $active_values = [];

            foreach ($values['value'] as $value) {

              if ($value) $active_values[] = $value;

              if ($value) {

                $active_values[] = $value;

              }

            }

            $values['value'] = implode("+", $active_values);

          }

          $args[] = $values['value'];

        }

        else {

          // This is needed to allow multiple contextual filters.

          $args[] = NULL;

        }

      }

      $this->view->setArguments($args);

    }