> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mixpanel.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Error Troubleshooting

> Index of Mixpanel error pages: API status codes, ingestion failures, warehouse connector authentication, and identity problems

Find the error you hit, by the message the API returned or by the symptom you're seeing.

## API Status Codes

> **[400 Bad Request](https://docs.mixpanel.com/troubleshooting/errors/400-bad-request.md)**
>
> Events failed validation on /import.

> **[401 Unauthorized](https://docs.mixpanel.com/troubleshooting/errors/401-unauthorized.md)**
>
> Mixpanel could not authenticate the request.

> **[403 Forbidden](https://docs.mixpanel.com/troubleshooting/errors/403-forbidden.md)**
>
> The request was understood but not permitted.

> **[413 Payload Too Large](https://docs.mixpanel.com/troubleshooting/errors/413-payload-too-large.md)**
>
> The request body exceeded the size limit.

> **[429 Too Many Requests](https://docs.mixpanel.com/troubleshooting/errors/429-rate-limit-exceeded.md)**
>
> The project exceeded the ingestion rate limit.

## Data Problems

> **[Duplicate events](https://docs.mixpanel.com/troubleshooting/errors/duplicate-events.md)**
>
> The same event appears more than once in reports.

> **[Historical events missing](https://docs.mixpanel.com/troubleshooting/errors/historical-events-not-appearing.md)**
>
> A backfill returned success but the events never arrived.

## Identity

> **[Events with no user](https://docs.mixpanel.com/troubleshooting/errors/server-side-events-without-a-user.md)**
>
> What to send as distinct\_id when nobody is logged in.

> **[Duplicate user profiles](https://docs.mixpanel.com/troubleshooting/errors/duplicate-user-profiles.md)**
>
> One person appears as several Mixpanel users.

## Warehouse Connectors

> **[Snowflake: JWT token is invalid](https://docs.mixpanel.com/troubleshooting/errors/snowflake-jwt-token-is-invalid.md)**
>
> Snowflake error 390144 during connector authentication.