Javascript function await is only valid in async functions

 have this app that uses OCR to read image text and convert it to JSON array then write it to an HTML table and export it as an Excel Worksheet by using phpspreedsheet the app was working so far so good until I played around it and missed up something after that Javascript function is not working anymore so it should work to write the table content to an Excel file by [Change.php]

prepare.js

function readFile(fileName) {
  console.log({ fileName });

  return await Tesseract.recognize(fileName, 'ara', {
  
    logger: m => console.log(m)
  });

}
function parseDataFromTextAndPropertyNames(text, propertyNames) {
  console.log({ text, propertyNames });

  return propertyNames
    .reduce((table, key) =>
      Object.assign(table, {

        [ key ]: RegExp(`${ key }\W+(\w+)`)
          .exec(text)?.[1] ?? ''

      }), {});
}
function writeParsedTextDataAsJSON(fileName, table) {
  console.log({ table });
   JSON.stringify({ table });

  // fake it ...
  return (await new Promise(resolve =>
    setTimeout(() => {

      console.log({ fileName, json: JSON.stringify({ table }) });
      resolve({ success: true });

    }, 1500)
  ));
}

console.log('... running ...');

function start(filenames) {
  const { data: { text } } = await readFile(filenames);

  const data = await
    parseDataFromTextAndPropertyNames(text, ['نقطة الخدمة', 'رقم العداد']);
 document.getElementById("dvjson").innerHTML = JSON.stringify(data, undefined, 4);
 const final = [JSON.stringify(data)];
 const ff = [JSON.parse(final)];
 constructTable('#table',ff);
 htmlstring = getElementById('table').innerHTML();
$.post('change.php', {string:htmlstring}).done(function(response){
      alert("done");
});
  console.log({ result });
}


// construct JSON array to HTML Table

 function constructTable(selector,data) {
             
            // Getting the all column names
            var cols = Headers(data, selector); 
  
            // Traversing the JSON data
            for (var i = 0; i < data.length; i++) {
                var row = $('<tr/>');  
                for (var colIndex = 0; colIndex < cols.length; colIndex++)
                {
                    var val = data[i][cols[colIndex]];
                     
                    // If there is any key, which is matching
                    // with the column name
                    if (val == null) val = ""; 
                        row.append($('<td/>').html(val));
                }
                 
                // Adding each row to the table
                $(selector).append(row);
            }
        }
         
        function Headers(data, selector) {
            var columns = [];
            var header = $('<tr/>');
             
            for (var i = 0; i < data.length; i++) {
                var row = data[i];
                 
                for (var k in row) {
                    if ($.inArray(k, columns) == -1) {
                        columns.push(k);
                         
                        // Creating the header
                        header.append($('<th/>').html(k));
                    }
                }
            }
             
            // Appending the header to the table
            $(selector).append(header);
                return columns;
        }

setTimeout(function() { 
      
        document.getElementById("loadspinne").style.display ="none";

        document.getElementById("message").style.display = "block";
      
    }, 8000);

prepare.php

<script src='scriptsprepare.js'></script>
<?php
if (!empty($target_file)){
    echo '<script>start("'.$target_file.'")</script>';
}
?>

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.16.2/xlsx.full.min.js"></script>
    <script src='https://unpkg.com/[email protected]/dist/tesseract.min.js'></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css"/>
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-0evHe/X+R7YkIZDRvuzKMRqM+OrBnVFBL6DOitfPri4tjfHxaWutUpFmBp4vmVor" crossorigin="anonymous">
    <link rel="stylesheet" href="stylemain.css">
    <script src="https://kit.fontawesome.com/bd514e8cb4.js" crossorigin="anonymous"></script>
    <script src='excelexportjs.js'></script>
</head>

<body>
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-pprn3073KE6tl6bjs2QrFaJGz5/SUsLqktiwsUTF55Jfv3qYSDhgCecCxMW52nD2" crossorigin="anonymous"></script>
    <center>
        <div id="loadspinne" style="width: 12rem; height: 12rem; color:#0A9ACD;" class="spinner-border" role="status"></div>
        </div>
        <div class="animate__animated animate__backInDown mx-auto d-block" style="display:none !important;" id="message">
        <h4 style="font-family:Hana; font-size:32px; font-weight:bold;">تم تكوين كشف بنجاح</h4>
        </div>
    </center>
    <div class="container mt-5 ">
    <div style="display:none;" id="dvjson"></div>
    <table align="center" id="table"  border="1" style="display:none;"></table>
    </div>
</body>
</html>

Change.php

<?php
require 'vendor/autoload.php';

use PhpOfficePhpSpreadsheetSpreadsheet;
use PhpOfficePhpSpreadsheetWriterXlsx;
use PhpOfficePhpSpreadsheetReaderIReader;
$htmlString = $_GET['htmlstring'];

$reader = new PhpOfficePhpSpreadsheetReaderHtml();
$spreadsheet = $reader->loadFromString($htmlString);

$writer = PhpOfficePhpSpreadsheetIOFactory::createWriter($spreadsheet, 'Xls');
$writer->save('ddd.xls'); 

$spreadsheet = PhpOfficePhpSpreadsheetIOFactory::load("ddd.xls");

$sheet = $spreadsheet->getActiveSheet();
$sheet->getColumnDimension('A')->setAutoSize(false);
$sheet->getColumnDimension('B')->setAutoSize(false);
$sheet->getColumnDimension('A')->setWidth(16);
$sheet->getColumnDimension('B')->setWidth(13);

$sheet->getStyle('A1:B1')->getFont()
    ->setName('Arial')
    ->setSize(14)
    ->setBold(true);
$writer = new Xlsx($spreadsheet);
$writer->save('ddd.xlsx');
// header('Location: ddd.xlsx');
?>

Cosnole Log [Errors]:-

Uncaught SyntaxError: await is only valid in async functions and the top level bodies of modules (at prepare.js:4:10)
upload.php:4 Uncaught ReferenceError: start is not defined
    at upload.php:4:9
(anonymous) @ upload.php:4