{"args":{},"error_type":"PydanticSerializationError","message":"Error serializing to JSON: TypeError: 'MockValSer' object cannot be converted to 'SchemaSerializer'"} #969

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opened 2026-02-16 10:21:08 -05:00 by yindo · 1 comment
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Originally created by @Moiyu1998 on GitHub (Feb 10, 2026).

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 Dify issues & Dify Official Plugins, 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

1.11.4

Plugin version

0.3.2

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

Image Image

When trying to enable Thinking Mode for claude-sonnet-4-5-20250929, an error occurred as shown in the image above.

✔️ Error log

No response

Originally created by @Moiyu1998 on GitHub (Feb 10, 2026). ### 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 [Dify issues](https://github.com/langgenius/dify/issues) & [Dify Official Plugins](https://github.com/langgenius/dify-official-plugins/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 1.11.4 ### Plugin version 0.3.2 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce <img width="383" height="465" alt="Image" src="https://github.com/user-attachments/assets/1f9e6ef2-9546-4ee0-bac1-e1dbdcc73041" /> <img width="357" height="118" alt="Image" src="https://github.com/user-attachments/assets/0f36483a-8403-4dbb-b2e8-85080ed4c813" /> When trying to enable Thinking Mode for claude-sonnet-4-5-20250929, an error occurred as shown in the image above. ### ✔️ Error log _No response_
yindo added the bug label 2026-02-16 10:21:08 -05:00
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Owner

@Moiyu1998 commented on GitHub (Feb 10, 2026):

Plugin version 0.3.0 can still be used normally, but all versions above 0.3.0 will report errors.

@Moiyu1998 commented on GitHub (Feb 10, 2026): Plugin version 0.3.0 can still be used normally, but all versions above 0.3.0 will report errors.
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Reference: langgenius/dify-official-plugins#969