---
page_type: error
code: 45376
message: "45376: Failed to add a participant.  Conversation was closed or not found."
level: WARNING
product: Flex
---

## Description

Failed to add Participant \<participant\_sid>. Conversation \<conversation\_sid> was closed or not found.

### Possible Causes

We did not add a Participant to a Channel because the Channel has either been closed or deleted.

### Possible Solutions

Ensure that the target Conversation is in the correct state.