Qt5.15 QWebEngineView not load javascript at page

gfxx

on Qt5.15 QWebEngineView linux on debugger obtain everytime these error:

js: TypeError: r.replaceAll is not a function
js: A client-side exception has occurred, see here for more info: https://nextjs.org/docs/messages/client-side-exception-occurred
js: Uncaught (in promise) TypeError: r.replaceAll is not a function
[14991:13:0424/212748.612639:ERROR:batching_media_log.cc(38)] MediaEvent: {"error":"FFmpegDemuxer: no supported streams"}
[14991:1:0424/212748.636417:ERROR:batching_media_log.cc(35)] MediaEvent: {"pipeline_error":14}
js: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://goo.gl/7K7WLu

on my chromium browser I've no problem on these, but QWebEngineView seems have mutch of problem when javascript perform some action or causes some warning on html code.

There are a way to solve or mitigate these issue?

regards