Notice: Undefined index: field_district_value in Drupal\views\Plugin\views\filter\FilterPluginBase->acceptExposedInput() (line 1513 of core/modules/views/src/Plugin/views/filter/FilterPluginBase.php).
Notice: Undefined index: field_district_value in Drupal\views\Plugin\views\filter\FilterPluginBase->acceptExposedInput() (line 1513 of core/modules/views/src/Plugin/views/filter/FilterPluginBase.php).
