QT 5.15.2 with QT webkit 212 based application gives "QtMultimediaWidgets" error

I have developed a sample QT based application on QT 5.15.2 and QT webkit 212. 
I have just added webkit widgets webkitwidgets in its pro file.
(QT += webkit widgets webkitwidgets core gui)
When I notarised this application, it launches fines at the system where I build it but on other system's this behaves as non notarised one and gives following error :
"File /Volumes/QT_15_5_Proj/QT_15_5_Proj.app/Contents/MacOS/../Frameworks/QtWebKitWidgets.framework/Versions/5/QtWebKitWidgets failed on rPathCmd /Users/neetikalakhani/Dummy_QT_webkit_212/qtwebkit-opensource-src-5.212/release/lib/QtMultimediaWidgets.framework/Versions/5/QtMultimediaWidgets (rpath resolved to: (path not found), bundleURL: /Volumes/QT_15_5_Proj/QT_15_5_Proj.app)"

If I remove webkitwidgets from pro file, this notarised app does not give any error and launches successfully.

So the issue here seems to be in webkitwidgets build for QT 5.15.2. 
Could you please suggest what can be the possible issue here?