BerriAI/litellm · error · Exception

Error fetching prompt version '{prompt_version_id}': {e}

Error message

Error fetching prompt version '{prompt_version_id}': {e}

What it means

Error "Error fetching prompt version '{prompt_version_id}': {e}" thrown in BerriAI/litellm.

Source

Thrown at litellm/integrations/arize/arize_phoenix_client.py:92

            data: Final = response.json()
            return data.get("data")

        except Exception as e:
            # Check if it's an HTTP error
            response = getattr(e, "response", None)
            if response is not None and hasattr(response, "status_code"):
                if response.status_code == 404:
                    return None
                elif response.status_code == 403:
                    raise Exception(
                        f"Access denied to prompt version '{prompt_version_id}'. Check your Arize Phoenix permissions."
                    )
                elif response.status_code == 401:
                    raise Exception("Authentication failed. Check your Arize Phoenix API key and permissions.")
                else:
                    raise Exception(f"Failed to fetch prompt version '{prompt_version_id}': {e}")
            else:
                raise Exception(f"Error fetching prompt version '{prompt_version_id}': {e}")

    def test_connection(self) -> bool:
        """
        Test the connection to the Arize Phoenix API.

        Returns:
            True if connection is successful, False otherwise
        """
        try:
            # Try to access the prompt_versions endpoint to test connection
            url: Final = f"{self.api_base}/prompt_versions"
            response: Final = self.http_handler.client.get(url, headers=self.headers)
            response.raise_for_status()
            return True
        except Exception:
            return False

    def close(self):

View on GitHub (pinned to 6c2dcb801b)

Solutions

1. Check network connectivity and Phoenix server status; verify prompt_version_id.

When it happens

Trigger: Thrown at litellm/integrations/arize/arize_phoenix_client.py:92 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@6c2dcb801b (2026-08-15). Data as JSON: /api/errors/8cc4b95f342ac2da. Report an issue: GitHub.