Updating my test site from 8.2.7 to 8.3.0 fails in the database update. Same thing happens whether I do it with drush or through the web interface. Here is the full error output:
system module
Update add_region_to_entity_displaysFailed: Drupal\Component\Plugin\Exception\PluginNotFoundException: The "entity_reference_autocomplete_category" plugin does not exist. in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 52 of /home/bemsi/public_html/ja/drupal8-composer/web/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php).
PHP 5.6.28 with the status page all green except for this db problem and the warning about experimental modules (Datetime Range, Migrate).
What extra info can I provide?