we have an app that renders some off-line files via QtWebEngine. The app is multiplatform. Yet recently when upgrading to Qt6 on MacOS the rendering stopped working.
If I turn of the QtWebEngine sandboxing, it works. The app does not use apple sandboxing.
I run out of ideas how to debug what is wrong.
I run all kinds of debug outputs.
I get
sandbox initialization failed: empty subpath pattern?
Is there something that changed from Qt5-Qt6? How to debug this? Or how to have non-empty subpath pattern?