Ubuntu 18.04.1 LTS
Firefox 63.0.3 (64-bit)
Today I submitted earlier bug related to Qt Websockets - https://bugreports.qt.io/browse/QTBUG-72011
After installing Qt 5.12 rc with Qt Creator 4.8 rc I did try to build SSL websocket client and server examples that did come with Qt 5.12 rc. As I pointed out in
QTBUG-72011, running websocket client and server (C++)
I added onError() code which is visible in attached screen shot.
Error 1015 according to https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent
"Indicates that the connection was closed due to a failure to perform a TLS handshake (e.g., the server certificate can't be verified)"
No sources were modified except me adding eve.code in onclose()