Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/commits/commit/4fcd0b33c7a0db2e86cccdc1831db235a6bc1b2d/drivers/pci/pci-emul-uclass.c
You should set ROOT_URL correctly, otherwise the web may not work correctly.
Since sandbox does not have real devices (unless it borrows those from the
host) it must use emulations. Provide a uclass which permits PCI operations
to be passed through to an emulation device.
Signed-off-by: Simon Glass <sjg@chromium.org>