Views Contextual Filters have the ability to display "Access Denied" based on the configuration settings and validation of the filter. Currently, entity_print ignores this and will simply generate an empty PDF, rather than providing a 403 response which would be more valid.
WHEN THE FILTER VALUE IS NOT IN THE URL to Display "Access Denied". Refactor \Drupal\entity_print_views\Renderer\ViewRenderer::renderSingle to check for denied in the View execulatble's build_info array after the call to render() and throw a AccessDeniedHttpException if it is set. This is similar to what is done in \Drupal\views\Plugin\views\display\PathPluginBase::execute.
I will post a patch shortly that does this.
Needs review
2.0
Code
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@jannakha Thanks for updating the MR.
The tests that were failing are now passing.
tested on D11.2 - as per fix - Access denied is displayed