---
page_type: error
code: 40147
message: >-
  40147: Failed to issue Supervise instruction due to missing or invalid
  'contact_uri' property
level: ERROR
product: TaskRouter
---

## Description

### Possible Causes

- The `contact_uri` is missing in the Supervisor's Worker attributes.
- The `contact_uri` in the Supervisor's Worker attributes is invalid.

### Possible Solutions

- Add a valid `contact_uri` to the Supervisor's Worker attributes.