BerriAI/litellm · error · CoreError

missing required field: {0}

Error message

missing required field: {0}

What it means

Error "missing required field: {0}" thrown in BerriAI/litellm.

Source

Thrown at litellm-rust/crates/core/src/error.rs:12

use thiserror::Error;

pub type CoreResult<T> = Result<T, CoreError>;

#[derive(Debug, Error, PartialEq, Eq)]
pub enum CoreError {
    #[error("expected {expected}, got {actual}")]
    InvalidType {
        expected: &'static str,
        actual: &'static str,
    },
    #[error("missing required field: {0}")]
    MissingField(&'static str),
    #[error("invalid response: {0}")]
    InvalidResponse(String),
    #[error("invalid provider: {0}")]
    InvalidProvider(String),
    #[error("invalid request: {0}")]
    InvalidRequest(String),
    #[error("{0}")]
    Auth(String),
    #[error("upstream request failed with status {status}: {body}")]
    Http { status: u16, body: String },
    #[error("upstream network error: {0}")]
    Network(String),
    #[error("routing error: {0}")]
    Routing(String),
}

pub fn json_type_name(value: &serde_json::Value) -> &'static str {

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Include the missing required field named in the error in the request/config payload.

When it happens

Trigger: Thrown at litellm-rust/crates/core/src/error.rs:12 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/d3a3b9c01db40031. Report an issue: GitHub.