issue with below code

[mustangs0786]

from crewai import Agent, Task, Crew

from langchain_openai import ChatOpenAI

import os

os.environ["OPENAI_API_KEY"] = "NA"

llm = ChatOpenAI(

model = "crewai-llama2",

base_url = "http://localhost:11434/v1")

general_agent = Agent(role = "Math Professor",

                  goal = """Provide the solution to the students that are asking mathematical questions and give them the answer.""",

                  backstory = """You are an excellent math professor that likes to solve math questions in a way that everyone can understand your solution""",

                  allow_delegation = False,

                  verbose = True,

                  llm = llm)

task = Task (description="""what is 3 + 5""",

         agent = general_agent)

crew = Crew(

        agents=[general_agent],

        tasks=[task],

        verbose=2

    )

result = crew.kickoff()

print(result)

###################################
error
ValidationError Traceback (most recent call last)
Cell In[26], line 31
11 llm = ChatOpenAI(
12
13 model = "llama2",
14
15 base_url = "http://localhost:11434/v1")
19 general_agent = Agent(role = "Math Professor",
20
21 goal = """Provide the solution to the students that are asking mathematical questions and give them the answer.""",
(...)
28
29 llm = llm)
---> 31 task = Task (description="""what is 3 + 5""",
32
33 agent = general_agent)
37 crew = Crew(
38
39 agents=[general_agent],
(...)
44
45 )
49 result = crew.kickoff()

File /opt/homebrew/lib/python3.12/site-packages/crewai/task.py:100, in Task.init(pydantic_self, **data)
98 def init(pydantic_self, **data):
99 config = data.pop("config", {})
--> 100 super().init(**config, **data)

File /opt/homebrew/lib/python3.12/site-packages/pydantic/main.py:176, in BaseModel.init(self, **data)
174 # __tracebackhide__ tells pytest and some other tools to omit this function from tracebacks
175 tracebackhide = True
--> 176 self.pydantic_validator.validate_python(data, self_instance=self)

ValidationError: 1 validation error for Task
expected_output
Field required [type=missing, input_value={'description': 'what is ...derstand your solution)}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.7/v/missing

[maxcurrent420]

I have this error also- just upgraded CrewAI (on Linux) and got this validation error (was working before)

Starts with this warning also:
module_import.py:87: LangChainDeprecationWarning: Importing GuardrailsOutputParser from langchain.output_parsers is deprecated. Please replace the import with the following: from langchain_community.output_parsers.rail_parser import GuardrailsOutputParser warnings.warn(

And then the error:
main.py", line 175, in __init__ self.__pydantic_validator__.validate_python(data, self_instance=self) pydantic_core._pydantic_core.ValidationError: 1 validation error for Task expected_output Field required [type=missing, input_value={'description': 'You will...o produce perfect code)}, input_type=dict] For further information visit https://errors.pydantic.dev/2.7/v/missing

[SumaiyaSultan2002]

you didnt add the expected output in the code
task = Task (description="""what is 3 + 5""",
agent = general_agent,
expected_output=' ')

[mustangs0786]

can you give a sample example expected_output to put here
thanks

[SumaiyaSultan2002]

insights_task = Task(
description='Identify top 10 key insights from the data in points format. ',
agent=insight_researcher,
expected_output='insights from the dataset',
)