When State Provider returns null a 500 error is returned due to rfc_7807_compliant_errors=true

[lifo101]

API Platform version(s) affected: 3.2.13 (symfony v6.4.3)

Description

I have a custom State Provider and if it returns null for a resource that does not exist, instead of getting a clear 404 response, api-platform throws an Error with a 500 response. The error says:

Unable to generate an IRI for the item of type "ApiPlatform\State\ApiResource\Error"

This only occurs when rfc_7807_compliant_errors is set to true (and is recommended according to the docs).

How to reproduce
set rfc_7807_compliant_errors to true in config.

api_platform:
  defaults:
    extra_properties:
      rfc_7807_compliant_errors: true

Create a State provider that returns a null value from provide.

class MyProvider implements ProviderInterface
{
    public function provide(Operation $operation, array $uriVariables = [], array $context = []): object|array|null
    {
        return null;
    }
}

Possible Solution

Additional Context