# The Unit 2 final quiz cannot generate feedback because the grader fails to resolve api-inference.huggingface.co, even though my solutions match the reference

> Source: <https://discuss.huggingface.co/t/the-unit-2-final-quiz-cannot-generate-feedback-because-the-grader-fails-to-resolve-api-inference-huggingface-co-even-though-my-solutions-match-the-reference/178159#post_3>
> Published: 2026-09-19 07:29:29+00:00

Thanks for reporting this — your description matches an upstream connectivity issue rather than

anything wrong with your quiz answers.

The Unit 2 grader calls the Hugging Face Inference API to generate feedback, and when the backend

cannot resolve `api-inference.huggingface.co`, the feedback step fails even if the submitted

solutions are correct. This is separate from the main website, which can still load normally.

Since you’ve already tried multiple browsers, networks, and resubmissions, the issue is almost

certainly on the grader side (DNS resolution or inference backend availability), not on your end.

The SmolAgents team will need to check the quiz’s feedback service and restore connectivity to the

Inference API. Once the resolver issue is fixed, the grader should be able to generate feedback

normally.

Thanks for the detailed troubleshooting — it helps confirm this is a backend problem rather than a

client-side one.