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"File validation failed for file xxxx.png" when I request API: /chat-messages #10708

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opened 2026-02-21 18:50:11 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 18:50:11 -05:00
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Originally created by @melcurve on GitHub (Mar 12, 2025).

Self Checks

  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues search for existing issues, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:）
  • Please do not modify this template :) and fill in all the required fields.

Dify version

1.0.1

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

Hi I'm just installed dify 1.0.1 on my server, it works fine, but when I request API: /chat-messages, I got this error, I didn't change anything, just copy the example code from doc, I think it's a bug.

My install step:

  1. Clone project from github.
  2. Copy env file and just run docker compose up -d;
  3. Set admin account & psw.
  4. Install plugin and set model's api key.
  5. Create app and works fine!
  6. Generated this app's api key, and use postman to test it (I test it by backend server as well);
  7. API works fine, but when I put "files" param, I always got "File validation failed for file xxxx.png" error;

Apologize for my bad English.

Image

✔️ Expected Behavior

Response normally.

❌ Actual Behavior

I got this error:
{
"code": "invalid_param",
"message": "File validation failed for file: xRJ6vNo9mUYeVNxt0KITXCXEuSk.png",
"status": 400
}

Originally created by @melcurve on GitHub (Mar 12, 2025). ### Self Checks - [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [x] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue，否则会被关闭。谢谢！:） - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 1.0.1 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce Hi I'm just installed dify 1.0.1 on my server, it works fine, but when I request API: /chat-messages, I got this error, I didn't change anything, just copy the example code from doc, I think it's a bug. My install step: 1. Clone project from github. 2. Copy env file and just run docker compose up -d; 3. Set admin account & psw. 4. Install plugin and set model's api key. 5. Create app and works fine! 6. Generated this app's api key, and use postman to test it (I test it by backend server as well); 7. API works fine, but when I put "files" param, I always got "File validation failed for file xxxx.png" error; Apologize for my bad English. ![Image](https://github.com/user-attachments/assets/7205e2b4-f5fc-4868-819c-0bdb4e7cb58a) ### ✔️ Expected Behavior Response normally. ### ❌ Actual Behavior I got this error: { "code": "invalid_param", "message": "File validation failed for file: xRJ6vNo9mUYeVNxt0KITXCXEuSk.png", "status": 400 }
yindo added the 🐞 bug label 2026-02-21 18:50:11 -05:00
yindo closed this issue 2026-02-21 18:50:11 -05:00
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Reference: langgenius/dify#10708
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