[[qanda:topic_unsolved]] Native compile QtWebEngine Raspberry Pi 4

I want to compile "qt-everywhere-src-5.15.0" and especially QtWebEngine native on a Raspberry Pi 4. I make a build directory and go in it, to use the following command:

sudo ../qt-everywhere-src-5.15.0/configure -v -opengl es2 -device linux-rasp-pi4-v3d-g++ -device-option CROSS_COMPILE=/usr/bin/ -opensource -confirm-license -optimized-qmake -reduce-exports -release -qt-pcre -make libs -prefix /usr/local/qt5pi -sysroot / -pkg-config -skip qtscript -skip qtandroidextras -skip qtmacextras -skip qtpurchasing -skip qtwinextras -skip qtcanvas3d  -developer-build

The config.summary was ok:

Qt WebEngine Build Tools:
  Use System Ninja ....................... yes
  Use System Gn .......................... no
  Jumbo Build Merge Limit ................ 8
  Developer build ........................ yes
  QtWebEngine required system libraries:
    fontconfig ........................... yes
    dbus ................................. yes
    nss .................................. yes
    khr .................................. yes
    glibc ................................ yes
  QtWebEngine required system libraries for qpa-xcb:
    x11 .................................. yes
    libdrm ............................... yes
    xcomposite ........................... yes
    xcursor .............................. yes
    xi ................................... yes
    xtst ................................. yes
  Optional system libraries used:
    re2 .................................. no
    icu .................................. no
    libwebp, libwebpmux and libwebpdemux . yes
    opus ................................. no
    ffmpeg ............................... no
    libvpx ............................... no
    snappy ............................... yes
    glib ................................. yes
    zlib ................................. yes
    minizip .............................. yes
    libevent ............................. yes
    jsoncpp .............................. yes
    protobuf ............................. no
    libxml2 and libxslt .................. yes
    lcms2 ................................ yes
    png .................................. yes
    JPEG ................................. yes
    harfbuzz ............................. yes
    freetype ............................. yes
    xkbcommon ............................ yes

After the command make - and serveral hours of waiting - I get the errors:

make[4]: *** No rule to make target '/home/pi/build/qtwebengine/src/core/release/QtWebEngineCore.stamp', needed by '../../libQt5WebEngineCore.so.5.15.0' Stop.
make[4]: Leaving directory '/home/pi/build/qtwebengine/src/core'
make[3]: *** [Makefile:132: sub-core_module-pro-install_subtargets] Error 2
make[3]: Leaving directory '/home/pi/build/qtwebengine/src/core'
make[2]: *** [Makefile:91: sub-core-install_subtargets] Error 2
make[2]: Leaving directory '/home/pi/build/qtwebengine/src'
make[1]: *** [Makefile:61: sub-src-install_subtargets] Error 2
make[2]: Leaving directory '/home/pi/build/qtwebengine'
make: *** [Makefile:964: module-qtwebengine-install_subtargets] Error 2

Can anyone help me solving the problem?