=> not allowed in just one spreadsheet [duplicate] - google-apps-script

Question

This question already has answers here:
Running multiple sheets under one google script, syntax error
(2 answers)
TypeError: Cannot find function includes in object
(5 answers)
Closed 6 months ago.
Could you advise please why I get syntax error for => in google script in the below code? If I remove the filter part (values = values.filter(e=>e[0]);) the functions work well. In another file the code with the filter works fine.
function main(){
moveData();
clearRange1();
}
function moveData () {
var ss = SpreadsheetApp.getActive();
var dailySheet = ss.getSheetByName('Վաճառքի գներ');
var appendSheet = SpreadsheetApp.openById('1fpJpb5buD236iO7sHuANdqkPEd2QEQ-QewIIl7us_UQ').getSheetByName('Sheet1');
var values = dailySheet.getRange("Վաճառքի գներ!3:" + dailySheet.getLastRow()).getValues();
values = values.filter(e=>e[0]); //gets rid of blank rows. filters based on the first column (index 0).
appendSheet.getRange(appendSheet.getLastRow()+1,1,values.length,values[0].length).setValues(values);
}
function clearRange1() { //replace 'Sheet1' with your actual sheet name
var sheet = SpreadsheetApp.openById('1bdsEQOq7YeVtu0bxH67zrLqlW7uhHBdu0Uwu6ck87UU').getSheetByName('Sheet1')
sheet.getRange('A3:S').clearContent();
var sheet = SpreadsheetApp.openById('1p53h8P_64WC7hG7IwIYxRcb08uGN25oXrH6mtL7u2lQ').getSheetByName('Sheet1')
sheet.getRange('C4:E').clearContent();
}