Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/blame/commit/71cbed31f4f123708b8b3397cb166155c4a71f66/configs/T1024QDS_DDR4_defconfig
You should set ROOT_URL correctly, otherwise the web may not work correctly.