Accessibility error (PDFs - Documents should have a meaningful title specified)

DomPDF

$dompdf->add_info('Title', 'Your meta title');

Mpdf

$mpdf->SetTitle('My Title');
$mpdf->SetDisplayPreferences('/DisplayDocTitle');

TCPDF

$tcpdf->SetTitle('My Title');
$tcpdf->->setViewerPreferences([
  'DisplayDocTitle ' => TRUE,
]);