Help:When I clicked into the chatflow workflow, there was a 500 error message

[idleQing]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

When I click into the chatflow workflow, I will see an error in the container of dify-api-1. It seems to be caused by model selection thinking, but I cannot confirm which model it is. How can I confirm this？？？

2025-12-25 09:35:18.229 INFO [GraphWorker-1] [_client.py:1038] - HTTP Request: POST http://sandbox:8194/v1/sandbox/run "HTTP/1.1 200 OK"
2025-12-25 09:35:27.702 ERROR [Dummy-8920] [base.py:211] - Error in stream reponse for plugin {'code': -500, 'message': '{"message":"{\"error_type\":\"unmarshal_error\",\"message\":\"unmarshal json failed: use_template enable_thinking not found\"}","error_type":"PluginInvokeError","args":null}', 'data': None}
2025-12-25 09:35:27.703 WARNING [Dummy-8920] [provider_configuration.py:1717] - get custom model schema failed, req_id: af4e2da046 PluginInvokeError: {"error_type":"unmarshal_error","message":"unmarshal json failed: use_template enable_thinking not found"}
2025-12-25 09:35:27.713 ERROR [Dummy-8920] [base.py:211] - Error in stream reponse for plugin {'code': -500, 'message': '{"message":"{\"error_type\":\"unmarshal_error\",\"message\":\"unmarshal json failed: use_template enable_thinking not found\"}","error_type":"PluginInvokeError","args":null}', 'data': None}
2025-12-25 09:35:27.714 WARNING [Dummy-8920] [provider_configuration.py:1717] - get custom model schema failed, req_id: af4e2da046 PluginInvokeError: {"error_type":"unmarshal_error","message":"unmarshal json failed: use_template enable_thinking not found"}
2025-12-25 09:35:27.787 WARNING [Dummy-8920] [provider_configuration.py:1717] - get custom model schema failed, {"code":0,"message":"success","data":{"model_schema":null}}

2. Additional context or comments

No response

[dosubot[bot]]

The 500 error with "unmarshal json failed: use_template enable_thinking not found" happens because Dify 1.11.0 expects new required fields (like enable_thinking and use_template) in the model/plugin configuration, but older plugins or model configs don't provide them. This causes schema validation to fail and blocks the workflow from loading or running [details].

To confirm which model is active and causing the error:

1. The active model for each step in your chatflow is stored in the workflow's graph JSON. You can inspect this by exporting the workflow (if the UI allows), using the API, or querying the graph field in the workflows table in your database.
2. In the graph JSON, look for the node with "type": "llm" (or similar). Inside its "data" section, you'll find a "model" object with fields like "provider", "name", and "mode". This tells you which model/plugin is being used.
3. The error is triggered if the model/plugin config for that node is missing the required fields. For example, some plugins expect enable_thinking, while others (like DeepSeek v3.1 Volcengine) expect thinking instead [plugin param details].

To fix this:

• Update the plugin or model configuration to a version compatible with Dify 1.11.0 that includes the new required fields.
• If an update isn't available, you can manually add the missing fields to the model config in the workflow graph JSON (be careful and back up your data first).
• As a temporary workaround, you can roll back to Dify 1.9.x, which doesn't enforce these schema changes, but this is not recommended long-term [compatibility info].

If you need to patch the config manually, make sure you use the correct parameter names for your plugin/model. For example, use thinking for DeepSeek Volcengine, not enable_thinking.

Let me know if you want step-by-step instructions for exporting and editing the workflow graph JSON or for identifying the model via the API or database.

To reply, just mention @dosu.

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[idleQing]

I am currently in version 1.9.1

[dosubot[bot]]

Since you're on Dify 1.9.1, the platform itself does not require or enforce the enable_thinking or use_template fields in model or plugin schemas. If you're seeing errors about missing enable_thinking or use_template, it's likely that a plugin, workflow file, or model config was created for a newer Dify version and is not fully compatible with 1.9.1, or that a custom/third-party plugin expects these fields even though the core platform doesn't enforce them yet [details].

To resolve this, check that all your plugins, workflow files, and containers are consistent with Dify 1.9.1 and not mixed with newer versions. You can inspect your workflow's graph JSON (via export, API, or directly in the database) to see which model or plugin is active and what parameters it expects. If you find any references to enable_thinking or use_template, try removing them or switching to a plugin version that matches your Dify backend.

If you need step-by-step instructions for checking your workflow graph or plugin configs, let me know!

To reply, just mention @dosu.

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