Laravel Undefined index: document using PHPWord and DomPDF - php

Question

I'm trying to convert a odt file to a pdf, using PHPWord and DomPDF, I've read some issue on their git about how to do it and found this one guide. But I'm getting and error on laravel about the PHPWord library Undefined index: document on the route
C:\xampp\htdocs\DAW2M14\vendor\phpoffice\phpword\src\PhpWord\Reader\Word2007.php
foreach ($steps as $step) {
$stepPart = $step['stepPart'];
$stepItems = $step['stepItems'];
foreach ($relationships[$stepPart] as $relItem) {
$relType = $relItem['type'];
if (isset($stepItems[$relType])) {
$partName = $stepItems[$relType];
$xmlFile = $relItem['target'];
$this->readPart($phpWord, $relationships, $partName, $docFile, $xmlFile);
}
}
}
The error starts in the foreach.
My PHP code is:
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\URL_Document;
use App\Document;
use App\Http\Requests;
use Dompdf\Dompdf;
class CU_13Controller extends Controller
{
/**
* Show the application dashboard.
*
* #return \Illuminate\Http\Response
*/
public function generaPDF(Request $request, $id, $nombre, $path, $pathb, $formato) {
$ruta=$path.'/'.$pathb;
if($formato == "pdf"){
return response()->download(storage_path("app/{$ruta}"));
}else{
$FilePath = "app/".$ruta;
$phpWord = new \PhpOffice\PhpWord\PhpWord();
$document = $phpWord->loadTemplate(storage_path("app/{$ruta}"));
$document->saveAs('temp.odt');
$domPdfPath = base_path('/../vendor/dompdf/dompdf');
\PhpOffice\PhpWord\Settings::setPdfRendererPath($domPdfPath);
\PhpOffice\PhpWord\Settings::setPdfRendererName('DomPDF');
$phpWord = \PhpOffice\PhpWord\IOFactory::load('temp.odt');
$pdfWriter = \PhpOffice\PhpWord\IOFactory::createWriter( $phpWord, 'PDF' );
$pdfWriter->save(storage_path("app/documents{$nombre}.pdf"));
return response()->download(storage_path("app/documents{$nombre}.pdf"));
}
}
}
I don't know what kind of error I am doing