---
page_type: error
code: 90403
message: "90403: [Autopilot] Signature validation failed"
level: ERROR
product: Understand
---

## Description

Signature validation is failed.

### Possible Causes

The account owns the messaging/voice service does not have any parent/sub-account relationship with the account owns the Autopilot assistant.

### Possible Solutions

Moving the assistant (export and import) into the service account or service account's one of the sub-accounts would solve the problem.