---
page_type: error
code: 40159
message: >-
  40159: Conference Instruction does not have a valid 'status_callback_url'
  parameter
level: ERROR
product: TaskRouter
---

## Description

Invalid 'status\_callback\_url' parameter - Conference Instruction

### Possible Causes

Provided value for the "status\_callback\_url" parameter is either an empty string or of an incorrect datatype.

### Possible Solutions

"status\_callback\_url" should be a well formed HTTP or HTTPS URL string.