I am trying to access. All required modules are included, rights granted. so does not work. /user/register?_format=hal_json
I get a message:
{"message":"Not acceptable format: hal_json"}
In RestUi settings, hal_json format is enabled.
And in the log:
Symfony\Component\HttpKernel\Exception\NotAcceptableHttpException: Not acceptable format: hal_json in Drupal\Core\EventSubscriber\RenderArrayNonHtmlSubscriber->onRespond() (line 30 of .../web/core/lib/Drupal/Core/EventSubscriber/RenderArrayNonHtmlSubscriber.php).
Drupal 9.0 and Drupal 8.8.4