Fix a google spreadsheet script

I have a google spreadsheet that send a sms to Twilio trough a script, it has been working until this week in which a get a error message "Request failed for [login to view URL] returned code 400. Truncated server response: {"code": 21602, "message": "Message body is required.", "more_info": "[login to view URL]", "status": 400} (use muteHttpExceptions option to examine full response) (line 62, file "Code")"