Download PDF in Laravel 9 using barryvdh/laravel-dompdf give us a pdf file corrupted

trying to download file using barryvdh/laravel-dompdf from html render view

// Generate the PDF from the HTML content
$pdf = PDF::loadHTML($contract_document)->setPaper('a4', 'landscape')
->setOption('zoom', 1.2)
->setOption('footer-center', '')
->setOption('footer-font-size', 5);


return $pdf->download($ad_id . '.pdf');


it download file corrupted if if I open in pdf fire fox it give me the below error :

Invalid or corrupted PDF file.

PDF.js v4.7.18 (build: 9735a840a)
Message: Invalid PDF structure. viewer.mjs:12184:13
Uncaught (in promise)
Object { message: "Invalid PDF structure.", name: "InvalidPDFException", stack: "BaseExceptionClosure@resource://pdf.js/build/pdf.mjs:453:29\n@resource://pdf.js/build/pdf.mjs:456:2\n" }


can you please advice ?

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