Undefined coin sanity check for offline-documentation platform

CMake Error at qtwebengine/cmake/QtConfigureHelpers.cmake:300 (message):
Undefined coin sanity check for offline-documentation platform
Call Stack (most recent call first):
qtwebengine/CMakeLists.txt:59 (qt_webengine_configure_check_coin)
-- Configuring incomplete, errors occurred!
CMake Error at qtbase/cmake/QtProcessConfigureArgs.cmake:1143 (message):
CMake exited with code 1.