Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/src/commit/98e43917dc89631c46d0b8eb481345041912ebee/nand_spl You should set ROOT_URL correctly, otherwise the web may not work correctly.

upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support

Stefan Roese 887e2ec9ec Add support for AMCC Sequoia PPC440EPx eval board ... - Add support for PPC440EPx & PPC440GRx - Add support for PPC440EP(x)/GR(x) NAND controller in cpu/ppc4xx directory - Add NAND boot functionality for Sequoia board, please see doc/README.nand-boot-ppc440 for details - This Sequoia NAND image doesn't support environment in NAND for now. This will be added in a short while. Patch by Stefan Roese, 07 Sep 2006		19 years ago
..
board/amcc/sequoia	Add support for AMCC Sequoia PPC440EPx eval board	19 years ago
nand_boot.c	Add support for AMCC Sequoia PPC440EPx eval board	19 years ago