I have a few webforms on my D9 site. They all work for anonymous site visitors except for the contact form, which gives an "access denied" error.
The permissions under the form's Settings->Access tab are the same as for other forms that do work.
The form's access permissions are set to allow anonymous / authenticated / admin users to create and view/ update own submissions:
![Create submissions: Roles: anonymous user, authenticated user, administrator](https://i.stack.imgur.com/a8V9f.png)
![View/ Update Own Submissions: anonymous, authenticated, administrator](https://i.stack.imgur.com/R7P7n.png)
I did search for the solution but what I found didn't help. I tried the debugging code from https://drupal.stackexchange.com/a/315766 and get the following messages:
The website encountered an unexpected error. Please try again later.
Exception: ACCESS DENIED: in Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException->__construct() (line 28 of /path/to/vendor/symfony/http-kernel/Exception/AccessDeniedHttpException.php).
Drupal\Core\Http\Exception\CacheableAccessDeniedHttpException->__construct() (Line: 118)
Drupal\Core\Routing\AccessAwareRouter->checkAccess() (Line: 95)
Drupal\Core\Routing\AccessAwareRouter->matchRequest() (Line: 112)
Symfony\Component\HttpKernel\EventListener\RouterListener->onKernelRequest()
call_user_func() (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 145)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 81)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 23)
Stack\StackedHttpKernel->handle() (Line: 718)
Drupal\Core\DrupalKernel->handle() (Line: 19)
I don't know what this all means. Where do I go from here? Thank you.