[BUG] Cannot use Ollama with process=Process.hierarchical

[DiogoMartins004]

Description

Cannot use Ollama with process=Process.hierarchical. But if I change to sequential, it works.

Steps to Reproduce

1. Run the code
2. Error

Expected behavior

The hierarchical process should work the same way when not using Ollama.

Screenshots/Code snippets

Input

crew = Crew(
    tasks=[task],
    agents=[researcher, writer],
    process=Process.hierarchical,
    respect_context_window=True,
    memory=True,
    manager_agent=manager,
    planning=True,
    verbose=True,
)

Output

raise AuthenticationError(
litellm.exceptions.AuthenticationError: litellm.AuthenticationError: AuthenticationError: OpenAIException - Error code: 401 -
{
  'error':
  {
    'message': 'Incorrect API key provided: sk-proj-1111. You can find your API key at https://platform.openai.com/account/api-keys.',
    'type': 'invalid_request_error', 'param': None, 'code': 'invalid_api_key'
  }
}

Operating System

Other (specify in additional context)

Python Version

3.12

crewAI Version

0.86.0

crewAI Tools Version

0.25.8

Virtual Environment

Venv

Evidence

raise AuthenticationError(
litellm.exceptions.AuthenticationError: litellm.AuthenticationError: AuthenticationError: OpenAIException - Error code: 401 -
{
  'error':
  {
    'message': 'Incorrect API key provided: sk-proj-1111. You can find your API key at https://platform.openai.com/account/api-keys.',
    'type': 'invalid_request_error', 'param': None, 'code': 'invalid_api_key'
  }
}

Possible Solution

None

Additional context

OS: macOS 15 Sequoia

[douglaschalegre]

I managed to use ollama with Process.hierarchical, this is my config:

manager = LLM(model="ollama/phi4", base_url="http://localhost:11434")

@CrewBase
class DocAutomation:
    @crew
        def crew(self) -> Crew:
            """Creates the DocAutomation crew"""
            # To learn how to add knowledge sources to your crew, check out the documentation:
            # https://docs.crewai.com/concepts/knowledge#what-is-knowledge
    
            return Crew(
                agents=self.agents,  # Automatically created by the @agent decorator
                tasks=self.tasks,  # Automatically created by the @task decorator
                # process=Process.sequential,
                process=Process.hierarchical,
                manager_llm=manager,
                manager_agent=None,
                verbose=True,
                # planning=True,
            )