Why? GPT Action response empty

If the URL Server is set to “aaaa/news/”, it properly fetches the response.
(The action works correctly.)

However, changing to “bbb/news/” results in an empty response.

[debug] Response received

This is the result obtained.
I’ve checked everything from the server-side firewall to external factors with the same code, but couldn’t find any problem.
Yet, I’m unable to fetch the correct results.
External checks from postman to “bbb/news/” are all normal.
I don’t understand why it doesn’t work properly with openai action.
I would really appreciate it if you could point out any suspicious areas.