Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/src/commit/023889838282b6237b401664f22dd22dfba2c066/board/RPXlite 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
 
 
 
 
 
 
u-boot/board/RPXlite
Wolfgang Denk 2b208f5308 Move "ar" flags to config.mk to allow for silent "make -s" 19 years ago
..
Makefile
RPXlite.c
config.mk
flash.c
u-boot.lds
u-boot.lds.debug