Issue #3180227: Notice: Trying to access array offset on value of type null in Drupal\views\Plugin\views\display\EntityReference->query()

core/modules/views/src/Plugin/views/display/EntityReference.php

@@ -155,7 +155,18 @@ public function query() {
     $id_table = $this->view->storage->get('base_table');
     $this->id_field_alias = $this->view->query->addField($id_table, $id_field);
 
-    $options = $this->getOption('entity_reference_options');
+    $options = $this->getOption('entity_reference_options') ?? [];
+    // The entity_reference_options are typically set during a call to
+    // Drupal\views\Plugin\EntityReferenceSelection\ViewsSelection::initializeView().
+    // If any entity_reference_options are not yet set, we apply the same
+    // default values that would typically be added by that method.
+    $default_options = [
+      'match' => NULL,
+      'match_operator' => 'CONTAINS',
+      'limit' => 0,
+      'ids' => NULL,
+    ];
+    $options += $default_options;
 
     // Restrict the autocomplete options based on what's been typed already.
     if (isset($options['match'])) {