Still have issue PluginNotFoundError: plugin not found in version 1.13.0

[sanpatricky]

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Dify version

1.13.0

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

Run an existing chatflow that include agent node

✔️ Expected Behavior

Run successfully

❌ Actual Behavior

The agent node shows error：PluginNotFoundError: plugin not found.

tool_runtime = ToolManager.get_agent_tool_runtime(

               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/app/api/core/tools/tool_manager.py", line 369, in get_agent_tool_runtime

tool_entity = cls.get_tool_runtime(

              ^^^^^^^^^^^^^^^^^^^^^

File "/app/api/core/tools/tool_manager.py", line 185, in get_tool_runtime

provider_controller = cls.get_builtin_provider(provider_id, tenant_id)

                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/app/api/core/tools/tool_manager.py", line 114, in get_builtin_provider

plugin_provider = cls.get_plugin_provider(provider, tenant_id)

                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/app/api/core/tools/tool_manager.py", line 144, in get_plugin_provider

provider_entity = manager.fetch_tool_provider(tenant_id, provider)

                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/app/api/core/plugin/impl/tool.py", line 67, in fetch_tool_provider

response = self._request_with_plugin_daemon_response(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/app/api/core/plugin/impl/base.py", line 264, in _request_with_plugin_daemon_response

self._handle_plugin_daemon_error(error.error_type, error.message)

File "/app/api/core/plugin/impl/base.py", line 357, in _handle_plugin_daemon_error

raise PluginNotFoundError(description=message)

core.plugin.impl.exc.PluginNotFoundError: req_id: a95dcbab95 PluginNotFoundError: plugin not found

2026-02-12 00:55:15.397 ERROR [GraphDispatcher] [error_handler.py:101] - Node 1767365339291 failed with ABORT strategy: req_id: a95dcbab95 PluginNotFoundError: plugin not found

2026-02-12 00:55:15.419 INFO [Dummy-991] [trace.py:128] 4d827845de2557bb89ac24133926d6dd - Task tasks.app_generate.workflow_execute_task.workflow_based_app_execution_task[f92f854c-ab64-40a9-8fa6-a0a14051c0e7] succeeded in 0.202024917001836s: None

2026-02-12 00:55:15.502 ERROR [Thread-992 (_generate_worker)] [workflow_entry.py:124] 4d827845de2557bb89ac24133926d6dd - Unknown Error when workflow entry running

Traceback (most recent call last):

File "/app/api/core/workflow/workflow_entry.py", line 120, in run

yield from generator

File "/app/api/core/workflow/graph_engine/graph_engine.py", line 276, in run

raise self._graph_execution.error

RuntimeError: req_id: a95dcbab95 PluginNotFoundError: plugin not found

[fatelei]

how about your dsl

[sanpatricky]

A very simple mcp testing purpose chatflow:
app:
description: ''
icon: 🤖
icon_background: '#FFEAD5'
mode: advanced-chat
name: chatflowwithagent
use_icon_as_answer_icon: false
dependencies: []
kind: app
version: 0.6.0
workflow:
conversation_variables: []
environment_variables: []
features:
file_upload:
allowed_file_extensions:
- .JPG
- .JPEG
- .PNG
- .GIF
- .WEBP
- .SVG
allowed_file_types:
- image
allowed_file_upload_methods:
- remote_url
- local_file
enabled: true
fileUploadConfig:
attachment_image_file_size_limit: 2
audio_file_size_limit: 50
batch_count_limit: 5
file_size_limit: 15
file_upload_limit: 20
image_file_batch_limit: 10
image_file_size_limit: 10
single_chunk_attachment_limit: 10
video_file_size_limit: 100
workflow_file_upload_limit: 10
image:
enabled: false
number_limits: 3
transfer_methods:
- local_file
- remote_url
number_limits: 3
opening_statement: ''
retriever_resource:
enabled: true
sensitive_word_avoidance:
enabled: false
speech_to_text:
enabled: false
suggested_questions: []
suggested_questions_after_answer:
enabled: false
text_to_speech:
enabled: false
language: ''
voice: ''
graph:
edges:
- data:
isInLoop: false
sourceType: agent
targetType: answer
id: 1767365339291-source-answer-target
source: '1767365339291'
sourceHandle: source
target: answer
targetHandle: target
type: custom
zIndex: 0
- data:
isInLoop: false
sourceType: start
targetType: agent
id: 1767362653375-source-1767365339291-target
source: '1767362653375'
sourceHandle: source
target: '1767365339291'
targetHandle: target
type: custom
zIndex: 0
nodes:
- data:
selected: false
title: 用户输入
type: start
variables: []
height: 73
id: '1767362653375'
position:
x: 0
y: 0
positionAbsolute:
x: 0
y: 0
selected: false
sourcePosition: right
targetPosition: left
type: custom
width: 242
- data:
answer: '{{#1767365339291.text#}}'
selected: false
title: 直接回复
type: answer
variables: []
height: 103
id: answer
position:
x: 995.7142857142857
y: -108.42857142857146
positionAbsolute:
x: 995.7142857142857
y: -108.42857142857146
selected: false
sourcePosition: right
targetPosition: left
type: custom
width: 242
- data:
agent_parameters:
instruction:
type: constant
value: 如果有工具可以使用，回复工具的原始响应，不要翻译
model:
type: constant
value:
completion_params: {}
mode: chat
model: gpt-4o
model_type: llm
provider: langgenius/azure_openai/azure_openai
type: model-selector
query:
type: constant
value: '{{#sys.query#}}'
tools:
type: constant
value:
- enabled: true
extra:
description: 根据提供的名称返回问候语，当问候某人时使用该工具
parameters:
name:
auto: 1
value: null
provider_name: mcp-my-greeting
provider_show_name: Greeting
schemas:
- auto_generate: null
default: null
form: llm
human_description:
en_US: ''
ja_JP: ''
pt_BR: ''
zh_Hans: ''
label:
en_US: name
ja_JP: name
pt_BR: name
zh_Hans: name
llm_description: ''
max: null
min: null
name: name
options: []
placeholder: null
precision: null
required: true
scope: null
template: null
type: string
settings: {}
tool_description: 根据提供的名称返回问候语，当问候某人时使用该工具
tool_label: greet
tool_name: greet
type: mcp
agent_strategy_label: FunctionCalling
agent_strategy_name: function_calling
agent_strategy_provider_name: langgenius/agent/agent
meta:
minimum_dify_version: 1.7.0
version: 0.0.2
output_schema: {}
plugin_unique_identifier: langgenius/agent:0.0.29@ffa7bbc3bb6490e0cb9c380a5f64740b23548ceb4518f62ee56c104eec1f2b23
selected: true
title: Agent
tool_node_version: '2'
type: agent
height: 188
id: '1767365339291'
position:
x: 476.03399796523195
y: -37.48988155796667
positionAbsolute:
x: 476.03399796523195
y: -37.48988155796667
selected: true
sourcePosition: right
targetPosition: left
type: custom
width: 242
viewport:
x: 153.8699091899632
y: 361.3164197287089
zoom: 0.6668465986307563
rag_pipeline_variables: []

[fatelei]

Screen.Recording.2026-02-12.at.10.02.05.mov

i have try, there is no problem

[fatelei]

i use latest main code

[sanpatricky]

did you use an existing flow or create a new one? On my side, there is no issue for new creating flow, but the issue can duplicated by using an existing flow.

[fatelei]

did you use an existing flow or create a new one? On my side, there is no issue for new creating flow, but the issue can duplicated by using an existing flow.

old workflow，you should edit the tool again

[sanpatricky]

I confirmed this issue can be resolved by remove and add back the mcp tool used by the agent node.