# 21756: Opt-In Keywords Too Long

Log Type: TWILIO

Log Level: ERROR

## Description

The campaign submission could not be processed because the provided `opt_in_keywords` were invalid. Please verify the comma delimited length of all combined keywords does not exceed 255 characters.

### Possible causes

Total keyword string length exceeds 255 characters.

### Possible solutions

Shorten or reduce the number of opt-in keywords.