500 Internal Server Error when validating challenge config via GitHub Actions

Hi EvalAI team,

I'm currently setting up a challenge using GitHub Actions, following the [official documentation](https://github.com/Cloud-CV/EvalAI/blob/master/docs/source/host_challenge.md#host-challenge-using-github). I've pushed the challenge files to the challenge branch of my repository:
🔗 https://github.com/image-based-screen-industrial-detect/industrial-defect-challenge/tree/challenge

However, the GitHub Action fails during validation with the following error:

Following errors occurred while validating the challenge config:
500 Server Error: Internal Server Error for url: https://eval.ai/api/challenges/challenge/challenge_host_team/4014/validate_challenge_config/

Exiting the challenge_processing_script.py script after failure
Error: Process completed with exit code 1.

Exiting the challenge_processing_script.py script after failure
Error: Process completed with exit code 1.
What I’ve already verified:

The challenge_config.yaml file exists and passes YAML validation

All required files exist, including:

challenge_details/*.html

evaluation_script/evaluation.py (with a valid evaluate() function)

test_annotations/test.json

Paths in the config are correct

The repo secrets (EVALAI_HOST_URL, EVALAI_AUTH_TOKEN, HOST_TEAM_PK) are properly set

Still, the API call to validate the config results in a 500 error, which makes it hard to debug further on my side.

Could you help investigate what might be causing this issue on your backend or guide me on how to further debug?

Thank you!