Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode . Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript). Based on Qt 5.13.1 (MSVC 2017, 32 bit)
Qt Creator 4.10.1
The Qt 5.13 version is using SSL lib build: "OpenSSL 1.1.1b 26 Feb 2019" and
SSL lib version: "OpenSSL 1.1.1d 10 Sep 2019"

The QWebEngineView loads a local HTML page.
The user clicks a button the page.
The button transfers from the local page to an HTTPS page.
The HTTPS page loads about 40% in release config) and to 70%(debug config) verified by loadProgress then hangs for a number of seconds seconds.
Then the handshake error occurs and is displayed.

When the Qt app is built in "release" mode there are 2 errors

[2384:1456:0219/112603.780:ERROR:ssl_client_socket_impl.cc(962)] handshake failed; returned -1, SSL error code 1, net_error -205
[2384:1456:0219/112603.780:ERROR:ssl_client_socket_impl.cc(962)] handshake failed; returned -1, SSL error code 1, net_error -205
When the Qt app is built in "debug" mode the above errors display followed by
js: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
[3604:2600:0219/114659.321:INFO:CONSOLE(101)] "Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.", source: https://-----.------.com/payments/split/dojo/dojo.js;jsessionid=8CE2A0D2A32AAB0357316BC1B6E6AA66 (101)
[3604:2600:0219/114659.321:INFO:CONSOLE(101)] "Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.", source: https://-----.------.com/payments/split/dojo/dojo.js;jsessionid=8CE2A0D2A32AAB0357316BC1B6E6AA66 (101)
The "-----.-----" is just to obfuscate the HTTPS URL
Thoughts?
Should I call the payment clearing company?
Is this a known Qt bug or the responsibility of the URL owner providing the payment clearing service?
Is the "handshake" issue "SSL related" or it it due to a bad certificate in the Qt QWebEngine/Chomium stuff in the 5.13 version, or a certificate on the payment clearing URL?
libnssckbi.so is not in the 5.13 directory structure.
https://github.com/clearlinux/distribution/issues/1843
In Qt 5.13  /DevTools/Qt/5.13.2/Src/qtwebengine/src/3rdparty/chromium/crypto/nss_util.cc 
  // Load nss's built-in root certs.
  SECMODModule* InitDefaultRootCerts() {
    SECMODModule* root = LoadModule("Root Certs", "libnssckbi.so", nullptr);
    if (root)
      return root;
    // Aw, snap.  Can't find/load root cert shared library.
    // This will make it hard to talk to anybody via https.
    // TODO(mattm): Re-add the NOTREACHED here when crbug.com/310972 is fixed.
    return nullptr;