# 21748: Invalid Message Flow

Log Type: TWILIO

Log Level: ERROR

## Description

The campaign submission could not be processed because the provided message flow was invalid. The field must be present, and its length between 40 and 2048 characters.

### Possible causes

Message flow text is missing or outside the 40-2048 character limit.

### Possible solutions

Ensure message flow is present and between 40-2048 characters long.