dify - 💡(How to fix) Fix Error occurred in the operation of the agent node in the workflow.

Error Message

2026-05-28 05:44:28.330 ERROR [Dummy-148103] [base.py:313] e4f031f95efd56e3b2382fa5936e8f74 - Error in stream response for plugin {'code': -500, 'message': '{"message":"{\"error_type\":\"unmarshal_error\",\"message\":\"unmarshal json failed: content field is required\"}","error_type":"PluginInvokeError","args":null}', 'data': None} 2026-05-28 05:44:28.330 ERROR [Dummy-148103] [large_language_model.py:152] e4f031f95efd56e3b2382fa5936e8f74 - Error while consuming non-stream plugin chunk iterator. Traceback (most recent call last): self._handle_plugin_daemon_error(error.error_type, error.message)

Fix Action

Fix / Workaround

2026-05-28 05:44:27.553 INFO [Dummy-148103] [_client.py:1025] e4f031f95efd56e3b2382fa5936e8f74 - HTTP Request: GET http://plugin_daemon:5002/plugin/eee038f5-9ce9-466f-93f2-286c740beaa2/management/models?page=1&page_size=256 "HTTP/1.1 200 OK" 2026-05-28 05:44:28.328 INFO [Dummy-148103] [_client.py:1025] e4f031f95efd56e3b2382fa5936e8f74 - HTTP Request: POST http://plugin_daemon:5002/plugin/eee038f5-9ce9-466f-93f2-286c740beaa2/dispatch/llm/invoke "HTTP/1.1 200 OK" 2026-05-28 05:44:28.330 ERROR [Dummy-148103] [base.py:313] e4f031f95efd56e3b2382fa5936e8f74 - Error in stream response for plugin {'code': -500, 'message': '{"message":"{\"error_type\":\"unmarshal_error\",\"message\":\"unmarshal json failed: content field is required\"}","error_type":"PluginInvokeError","args":null}', 'data': None} 2026-05-28 05:44:28.330 ERROR [Dummy-148103] [large_language_model.py:152] e4f031f95efd56e3b2382fa5936e8f74 - Error while consuming non-stream plugin chunk iterator. Traceback (most recent call last): File "/app/api/.venv/lib/python3.12/site-packages/graphon/model_runtime/model_providers/base/large_language_model.py", line 138, in _build_llm_result_from_chunks for chunk in chunks: ^^^^^^ File "/app/api/core/plugin/impl/model.py", line 196, in invoke_llm yield from response File "/app/api/core/plugin/impl/base.py", line 314, in _request_with_plugin_daemon_response_stream self._handle_plugin_daemon_error(error.error_type, error.message) File "/app/api/core/plugin/impl/base.py", line 355, in _handle_plugin_daemon_error raise PluginInvokeError(description=message) core.plugin.impl.exc.PluginInvokeError: req_id: c957ff8af3 PluginInvokeError: {"error_type":"unmarshal_error","message":"unmarshal json failed: content field is required"} 2026-05-28 05:44:28.332 INFO [Dummy-148103] [ext_request_logging.py:73] e4f031f95efd56e3b2382fa5936e8f74 - POST /inner/api/invoke/llm 400 860.008 2026-05-28 05:44:28.447 INFO [Dummy-148104] [ext_request_logging.py:73] 66037573ea265949b4196323396f32a4 - GET /console/api/apps/06bffc8b-bf21-442a-bdd9-2f7f09c34e9c/workflows/draft/system-variables 200 16.989

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Dify version

1.14.2

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

✔️ Expected Behavior

None

❌ Actual Behavior

No response

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