QWebEngineview don't support QWebChannel?

[kkkiio]

In "standalone" example, there using QDesktopServices::openUrl to open the html file,
while I use QWebEngineView::load, it crash, the error message is [0919/101542:FATAL:origin.cc(16)] Check failed: origin[origin.size() - 1] != '/' (/ vs. /).
help!!!