Failed to send email: no recipient (line 19, file "Email") - google-apps-script

Question

I got notification like this
Exception: Failed to send email: no recipient (line 19, file "Email")
I got no idea what happened
/**
* Sends emails with data from the current spreadsheet.
*/
function sendEmails() {
var sheet = SpreadsheetApp.getActiveSheet();
var startRow = 3; // First row of data to process
var getLastRow = 900; // Number of rows to process
var dataRange = sheet.getRange(startRow, 1, getLastRow, 6);
// Fetch values for each row in the Range.
var data = dataRange.getValues();
for (var i = 0; i < data.length; ++i) {
var row = data[i];
var trigger = row[0]; // kolom ke 1 TRIGGER
var emailAddress = row[2]; // Email column
var message = row[4]; // Content column
var subject = row[3]; // Subject Column
var status_email = row[5];
if ((trigger != 'FALSE') && (status_email != 'EMAIL_SENT')) { // Prevents sending duplicates
MailApp.sendEmail(emailAddress, subject, message);
sheet.getRange(startRow + i, 6).setValue('EMAIL_SENT');
// Make sure the cell is updated right away in case the script is interrupted
SpreadsheetApp.flush();
}
}
}

Answer 1

You define getLastRow = 900 and emailAddress = row[2]
This means that from row 3 to row 900 you expect an email address to be present in each cell of column C
If you try to send an email from a row that does not contain an email address wou will get the error you metnioned
How to avoid the error?
Catch it with an if statement that checks either the cell is empty before sending the email
Sample
function sendEmails() {
var sheet = SpreadsheetApp.getActiveSheet();
var startRow = 3; // First row of data to process
var getLastRow = 900; // Number of rows to process
var dataRange = sheet.getRange(startRow, 1, getLastRow, 6);
// Fetch values for each row in the Range.
var data = dataRange.getValues();
for (var i = 0; i < data.length; ++i) {
var row = data[i];
var trigger = row[0]; // kolom ke 1 TRIGGER
var emailAddress = row[2]; // Email column
if(emailAddress != "" && emailAddress != " "){
var message = row[4]; // Content column
var subject = row[3]; // Subject Column
var status_email = row[5];
if ((trigger != 'FALSE') && (status_email != 'EMAIL_SENT')) { // Prevents sending duplicates
MailApp.sendEmail(emailAddress, subject, message);
sheet.getRange(startRow + i, 6).setValue('EMAIL_SENT');
// Make sure the cell is updated right away in case the script is interrupted
SpreadsheetApp.flush();
}
}
}
}