---
page_type: error
code: 50400
message: "50400: Programmable Chat: User not member of channel"
level: ERROR
product: Programmable Chat
---

## Error - 50400

### Programmable Chat: User not member of channel

#### Possible Causes

- Specified User is not member of this Channel.

#### Possible Solutions

- Confirm a valid User who is Member of this Channel is being passed in request.