Source compiles fine but complains on install

Hi there dear MuseScore,
I just downloaded the latest source from GitHub, it compiled just fine, but on trying to install it complains that:
CMake Error at mscore/cmake_install.cmake:36 (file):
file INSTALL cannot find "//QtWebEngineProcess".
Call Stack (most recent call first):
cmake_install.cmake:76 (include)

Makefile:84: recipe for target 'install/strip' failed
make[1]: *** [install/strip] Error 1

But I know for sure that QtWebEngine is indeed installed! I even checked my system more than once to insure that both the library and the devel package are installed.

Any suggestions?!

Thanks a million times in advance.

Hosam Adeeb Nashed