# 40147: Failed to issue Supervise instruction due to missing or invalid 'contact\_uri' property

Log Type: APPLICATION

Log Level: ERROR

## 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.