---
page_type: error
code: 52118
message: "52118: FCM Bad Request"
level: ERROR
product: Notify
---

## Description

FCM Bad Request

### Possible Causes

- Invalid or missing registration token.
- Incorrectly formatted JSON payload.
- Invalid or missing required fields in the request.
- Exceeding the payload size limit.
- Invalid API key or authentication token.

### Possible Solutions

- Verify that the registration token is correct and not expired.
- Ensure the JSON payload is correctly formatted and adheres to FCM specifications.
- Check that all required fields are included and correctly populated in the request.
- Ensure the payload size does not exceed the maximum limit allowed by FCM.
- Verify the API key or authentication token is valid and has the necessary permissions.