TCPDF donsn't work after moving to another host - codeigniter-3

Question

I'm creating a PDF file with the TCPDF library. The function worked fine on the old server, but when I installed it on a new host, I received the following error. I searched extensively and discovered numerous topics claiming that the error was caused by XHTML syntax.
A PHP Error was encountered
Severity: Warning
Message: Undefined array key "thead"
Filename: tcpdf/tcpdf.php
Line Number: 16571
Backtrace:
File: C:\xampp\htdocs\townteam\application\libraries\tcpdf\tcpdf.php
Line: 16571 Function: _error_handler
File: C:\xampp\htdocs\townteam\application\libraries\tcpdf\tcpdf.php
Line: 17272 Function: getHtmlDomArray
File: C:\xampp\htdocs\townteam\application\libraries\tcpdf\tcpdf.php
Line: 5859 Function: writeHTML
File: C:\xampp\htdocs\townteam\application\libraries\tcpdf\tcpdf.php
Line: 17167 Function: MultiCell
File: C:\xampp\htdocs\townteam\application\views\pdfMachineCard_v.php
Line: 165 Function: writeHTMLCell
File:
C:\xampp\htdocs\townteam\application\controllers\MachineCards.php
Line: 307 Function: view
File: C:\xampp\htdocs\townteam\index.php Line: 315 Function:
require_once
Code
<?php
//============================================================+
// File name : example_005.php
// Begin : 2008-03-04
// Last Update : 2013-05-14
//
// Description : Example 005 for TCPDF class
// Multicell
//
// Author: Nicola Asuni
//
// (c) Copyright:
// Nicola Asuni
// Tecnick.com LTD
// www.tecnick.com
// info#tecnick.com
//============================================================+
/**
* Creates an example PDF TEST document using TCPDF
* #package com.tecnick.tcpdf
* #abstract TCPDF - Example: Multicell
* #author Nicola Asuni
* #since 2008-03-04
*/
// Include the main TCPDF library (search for installation path).
//require_once('tcpdf_include.php');
// create new PDF document
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
// set document information
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor('Mohamed Syam');
$pdf->SetTitle($user[0]['s_name']);
$pdf->SetSubject('TCPDF Tutorial');
$pdf->SetKeywords('TCPDF, PDF, example, test, guide');
// set default header data
//PDF_HEADER_TITLE
$pdf->SetHeaderData($user[0]['s_logo'], '50', '', ''); // header of the file
//$pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE.' 005', PDF_HEADER_STRING); // header of the file
// set header and footer fonts
$pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
$pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));
// set default monospaced font
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);
// set margins
$pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP+10, PDF_MARGIN_RIGHT);
$pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
$pdf->SetFooterMargin(PDF_MARGIN_FOOTER);
// set auto page breaks
$pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);
// set image scale factor
$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
// set some language-dependent strings (optional)
if (#file_exists(dirname(__FILE__).'/lang/eng.php')) {
require_once(dirname(__FILE__).'/lang/eng.php');
$pdf->setLanguageArray($l);
}
// ---------------------------------------------------------
// set font
$pdf->SetFont('times', '', 10);
// add a page
$pdf->AddPage();
// set cell padding
$pdf->setCellPaddings(1, 1, 1, 1);
// set cell margins
$pdf->setCellMargins(1, 1, 1, 1);
// set color for background
$pdf->SetFillColor(255, 255, 127);
// MultiCell($w, $h, $txt, $border=0, $align='J', $fill=0, $ln=1, $x='', $y='', $reseth=true, $stretch=0, $ishtml=false, $autopadding=true, $maxh=0)
// set some text for example
// set some text for example starting from here syam
$transactionNo="Machine Card No(# ".$head[0]['mc_id'].")";
$desc=$head[0]['mp_name'];
//$title=<<<EOD
//<h6> </h6>
//EOD;
$pdf->writeHTMLCell(0,0,'','',$transactionNo,0,1,0,true,'C',true);
$pdf->writeHTMLCell(0,0,'','',$desc,0,1,0,true,'C',true);
$name ='<table style="padding: 6px; text-align: left;font-size: x-small ;width: auto ">';
$name.='<tr>
<th style="border:1px solid #000;width:100px;background-color:#CCCCCC">Category</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['mac_cat']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;width:100px;background-color:#CCCCCC">Supplier</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['ms_name']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;background-color:#CCCCCC">Class</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['mc_name']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;background-color:#CCCCCC">Purpose</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['mp_name']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;background-color:#CCCCCC">Delivery Date</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['mac_date']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;background-color:#CCCCCC">Serial Number</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['a_code']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;background-color:#CCCCCC">Factory Code</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['a_name']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;background-color:#CCCCCC">Plant</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['loc_name']).'</th>
</tr>
<tr>
<th style="border:1px solid #000;background-color:#CCCCCC">Department</th>
<th style="border:1px solid #000">'.strtoupper ($head[0]['d_name']).'</th>
</tr> </table> <br><br>';
$table ='';
if(count($transactions) > 0){
$table.='<table style="border:1px solid #000;padding: 5px;"> <thead>';
$table.='<tr style="background-color:#CCCCCC">
<th style="border:1px solid #000;font-size: 10px">Date</th>
<th style="border:1px solid #000;font-size: 10px">Description</th>
<th style="border:1px solid #000;font-size: 10px">Installed Items [QTY]</th>
<th style="border:1px solid #000;font-size: 10px">Responsible</th>
</tr>';
$table.="</thead>";
}
foreach ($transactions as $row){
$table.='<tr>
<td style="border:1px solid #000;font-size: 10px">'.$row->mt_date.'</td>
<td style="border:1px solid #000;font-size: 10px">'.$row->mt_desc.'</td>
<td style="border:1px solid #000;font-size: 10px">'.$row->installed.'</td>
<td style="border:1px solid #000;font-size: 10px">'.$row->u_name.'</td>
</tr>';
}
$table .='</table>';
$pdf->writeHTMLCell(0,0,'','',$name,0,1,0,true,'L',true);
$pdf->writeHTMLCell(0,0,'','',$table,0,1,0,true,'C',true);
//c
// move pointer to last page
$pdf->lastPage();
// ---------------------------------------------------------
//Close and output PDF document
ob_clean();
//ob_end_clean();
$pdf->Output("MachineCard No#".$head[0]['a_code'].'.pdf', 'I');
//============================================================+
// END OF FILE
//============================================================+
Thanks