# 40143: TaskRouter->Conference

Log Level: ERROR

## Description

### Possible causes

* You provided a 'post\_work\_activity\_sid' that was invalid or no longer exists.

### Possible solutions

* Confirm a valid ActivitySid is being passed in the 'post\_work\_activity\_sid' parameter and it exists in your workspace.

### Example

```bash
{
	"instruction": "conference",
	"room_name": "abc",
	"to": "client:alice",
	"from": "18001234567",
	"post_work_activity_sid": "WA0123456789abcdef0123456789abcdef"
}
```