QSslCertificate load pem to x509 error

pem file content:

----BEGIN CERTIFICATE----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----END CERTIFICATE----

QFile certFile("/home/wn/cert.pem");
certFile.open(QIODevice::ReadOnly);
QSslCertificate cert(certFile.readAll(), QSsl::Pem);