Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/blame/commit/c294ac5c16f5ad5107b051f4a0de46d04d8ce13b/configs/Ippo_q8h_v5_defconfig
You should set ROOT_URL correctly, otherwise the web may not work correctly.