Can not run standalone Google App Script from a Google Spreadsheet - google-apps-script

Question

I have a google spreadsheet shared with co-workers to keep track of task status. And I want to set a function through a menu to block some ranges in which the tasks were completed. The protective permissions are set to only allow me (owner) to edit it.
I've built a standalone script to run as me for this shared spreadsheet by using UrlFetch. I've tried many kinds of codes but it didn't work. The below are 3 versions I tried.
And, of course, I set "Who has access to the app: Anyone, even anonymous" in the standalone script.
Photo 1: Standalone script setting
Thanks so much!
1st version: Without using Content Service
//In standalone script
function doGet(e){
var taskRange = e.parameter.taskRange;
var ss = SpreadsheetApp.openById('SHARING_SPREADSHEET_ID');
var sh = ss.getSheetByName('Sheet1');
var protection = sh.getRange(taskRange).protect().setDescription('Completed Task')
var result = protection.removeEditors(protection.getEditors())
return result
}
//In sharing spreadsheet script
var url = "https://script.google.com/macros/s/STANDALONE_SCRIPT_ID/exec"
function onOpen(){
SpreadsheetApp.getUi().createMenu('TASK')
.addItem('Protect Task', 'protectTask')
.addToUi();
}
function protectTask(){
var taskRange = SpreadsheetApp.getActiveSheet().getActiveRange()
var response = UrlFetchApp.fetch(url+"?taskRange="+taskRange);
Logger.log(response);
}
2nd version: Using Content Service
//In standalone script
function doGet(e){
var taskRange = e.parameter.taskRange;
var ss = SpreadsheetApp.openById('SHARING_SPREADSHEET_ID');
var sh = ss.getSheetByName('Sheet1');
var protection = sh.getRange(taskRange).protect().setDescription('Completed Task')
var result = protection.removeEditors(protection.getEditors())
return ContentService.createTextOutput(result)
}
//In sharing spreadsheet script
var url = "https://script.google.com/macros/s/STANDALONE_SCRIPT_ID/exec"
function onOpen(){
SpreadsheetApp.getUi().createMenu('TASK')
.addItem('Protect Task', 'protectTask')
.addToUi();
}
function protectTask(){
var taskRange = SpreadsheetApp.getActiveSheet().getActiveRange()
var response = UrlFetchApp.fetch(url+"?taskRange="+taskRange).getContentText();
Logger.log(response);
}
3rd version: Using Content Service with JSON
//In standalone script
function doGet(e){
var taskRange = e.parameter.taskRange;
var ss = SpreadsheetApp.openById('SHARING_SPREADSHEET_ID');
var sh = ss.getSheetByName('Sheet1');
var protection = sh.getRange(taskRange).protect().setDescription('Completed Task')
var result = protection.removeEditors(protection.getEditors())
return ContentService.createTextOutput(JSON.stringify(result)).setMimeType(ContentService.MimeType.JSON)
}
//In sharing spreadsheet script
var url = "https://script.google.com/macros/s/STANDALONE_SCRIPT_ID/exec"
function onOpen(){
SpreadsheetApp.getUi().createMenu('TASK')
.addItem('Protect Task', 'protectTask')
.addToUi();
}
function protectTask(){
var taskRange = SpreadsheetApp.getActiveSheet().getActiveRange()
var response = UrlFetchApp.fetch(url+"?taskRange="+taskRange).getContentText();
var result = JSON.Parse(response)
Logger.log(result);
}

Answer 1

One problem is this line:
var taskRange = SpreadsheetApp.getActiveSheet().getActiveRange()
Should be:
var taskRange = SpreadsheetApp.getActiveSheet().getActiveRange().getA1Notation();
Currently, the variable taskRange is a "class" It's not a string. You need to send a string.

Answer 2

FINALLY IT WORKS. I think the script was not running properly because I modified many times with many kinds of code. Therefore, I've created a new one and used the "stringified" log as #SandyGood suggested.
Many thanks to you all, specially, #SandyGood.
FINAL SCRIPTS
//In standalone script
function doGet(e){
var taskRange = e.parameter.taskRange;
var ss = SpreadsheetApp.openById('SHARING_SPREADSHEET_ID');
var sh = ss.getSheetByName('Sheet1');
var protection = sh.getRange(taskRange).protect().setDescription('Completed Task');
var result = protection.removeEditors(protection.getEditors());
var resultStr = JSON.stringify(result);
Logger.log('resultStr: ' + resultStr);
}
//In sharing spreadsheet script
var url = "https://script.google.com/macros/s/STANDALONE_SCRIPT_ID/exec"
function onOpen(){
SpreadsheetApp.getUi().createMenu('TASK')
.addItem('Protect Task', 'protectTask')
.addToUi();
}
function protectTask(){
var taskRange = SpreadsheetApp.getActiveSheet().getActiveRange().getA1Notation();
var response = UrlFetchApp.fetch(url+"?taskRange="+taskRange).getContentText();
Logger.log(response);
}