@수원 조 I'm glad to see that the issue is resolved. Thanks for posting your solution so that others experiencing the same thing can easily reference this. Since the Microsoft Q&A community has a policy that the question author cannot accept their own answer, they can only accept answers by others, I'll repost your solution in case you'd like to Accept the answer.
. Issue:
You are using Azure open ai batch using gpt-4o-mini-batch but unable to download the image.
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. Resolution:
You found that the image was blocked at your end.
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Please do not forget to "Accept the answer” and “up-vote” so that, this can be beneficial to other community members.