Update Date-Time stamp on checkbox clicked in Google Sheets with Google Apps Script

appsscript.json

{
  "timeZone": "Australia/Hobart",
  "dependencies": {
  },
  "exceptionLogging": "STACKDRIVER",
  "runtimeVersion": "V8"
}

Code.gs

// @author Yagisanatode @link https://www.yagisanatode.com
// Link to attached sheet. Go to File > Make a copy
// @link https://docs.google.com/spreadsheets/d/14orOMBnjpjHewUsWUgunZQKbeNNnZHM9JKMpkaCxRDA/edit#gid=0

// ####### on Edit trigger function #######
/**
 * Custom Apps Script Trigger function that runs when sheet is edited. 
 * @param {Object} e - Apps Script trigger event object. 
 */
function onEdit(e) {

  dtsOnCheck(e)
}

// ####### Date Time Stamp on Check. #######
/**
 * Adds date time stamp on checked. Removes it when unchecked.
 * @param {Object} e - Apps Script trigger event object. 
 * @param {Object.range} Range of edit selection. 
 * @param {Object.value} value that range is changed to. 
 */
function dtsOnCheck(e){
  const SS = SpreadsheetApp.getActiveSpreadsheet();
  const SheetName = "Sheet1";
  const ActiveSheet = SS.getActiveSheet();
  const ActiveSheetName = ActiveSheet.getName();
  
  if(ActiveSheetName == SheetName){
    const selectionCol = 1;
    const actionCol = e.range.columnStart

    if(selectionCol === actionCol){

      const checkVal = e.value
      const actionRow = e.range.rowStart
      const inputRange = `B${actionRow}:C${actionRow}`

      if(checkVal == 'TRUE'){
          console.log("check")
          console.log(checkVal)
          const date = new Date();
          const email = e.user;
          ActiveSheet.getRange(inputRange).setValues([[email,date]])

     
      }else if(checkVal == 'FALSE'){
        ActiveSheet.getRange(inputRange).clearContent()
      };
    };
  };
};