QWebSocket doesn't connect over TLS - qt

Question

I have a WebSocket which works good over WebSocket protocol, but I can not switch to WebSocketSecure protocol, It doesn't generate any errors on server side, client says error:141970DF:SSL routines:tls_construct_cke_psk_preamble:psk identity not found. The certificate was generated by certbot and is used of for https web site on same domain.
Server code:
QSslConfiguration conf = server.sslConfiguration();
QFile * privkey =
new QFile{"/etc/letsencrypt/live/example.com/privkey.pem"};
privkey->open(QFile::ReadOnly);
conf.setCaCertificates(QSslCertificate::fromPath(
"/etc/letsencrypt/live/example.com/fullchain.pem"));
conf.setPrivateKey(QSslKey(privkey));
conf.setProtocol(QSsl::TlsV1_0);
server.setSslConfiguration(conf);
if (server.listen(QHostAddress::Any, 54045)) {
connect(
&server, &QWebSocketServer::newConnection, this,
&Server::onNewConnection);
connect(&server, &QWebSocketServer::closed, this, &Server::closed);
qDebug() << "server started";
}
The client code:
import QtQuick 2.13
import QtWebSockets 1.13
WebSocket {
active: true
url: "wss://example.com:54045"
}
Output of openSSL:
$ openssl s_client -connect example.com:54045
CONNECTED(00000003)
140623606740288:error:14095126:SSL routines:ssl3_read_n:unexpected eof while reading:ssl/record/rec_layer_s3.c:302:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 325 bytes
Verification: OK
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
---