Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/blame/commit/f9d7e17e844f9e94c39a8c95f73a4454097a6948/include/sm501.h
You should set ROOT_URL correctly, otherwise the web may not work correctly.