Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/blame/commit/1a92541d9c5341c6cdf6f713b056c30c1e06a325/configs/BSC9132QDS_SPIFLASH_DDRCLK133_SECURE_defconfig
You should set ROOT_URL correctly, otherwise the web may not work correctly.