phpWord - setPassword()

Hi,anybody get the phpWord setPassword() to work?, been trying and it won’t set password. I can set the document as readonly, but not password protect to open

                    $phpWord = \PhpOffice\PhpWord\IOFactory::load("$infile");                                                
                    
                    $documentProtection = $phpWord->getSettings()->getDocumentProtection();
                    $documentProtection->setEditing('readOnly');
                    $documentProtection->setPassword("$encryption_key");
                    
                    $objWriter = \PhpOffice\PhpWord\IOFactory::createWriter($phpWord, 'Word2007');
                    $objWriter->save("$infile");

You better post to https://github.com/PHPOffice/PHPWord/issues.