Currently WebEngine in 5.13 on Windows is not tested by the CI, nor do we have packages to test. To fix this, we need a more recent version of MSVC 2017 in the CI , see QTBUG-71125 .
Update Visual Studio 2017 in CI from 15.1 to 15.8
[REG 5.12.1->5.13.0] webengine/quicknanobrowser crashes
REG-> 5.13b2 (package testing)/Windows: quicknanobrowser.exe no longer works