Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/blame/commit/c2cbd164ea5b5f564fcf03447c7bf9ec4a9f5699/configs/BSC9132QDS_SPIFLASH_DDRCLK133_SECURE_defconfig
You should set ROOT_URL correctly, otherwise the web may not work correctly.