[seL4] Cap fault in send phase while spawning processes

Hi folks, I'm currently porting over a project from the Kbuild/Kconfig build system to the new CMake based build system and am having some issues. I'm trying trying to spawn additional processes (2+) and I am encountering an error when I attempt to call 'process_config_default_simple'. The message reads: Caught cap fault in send phase at address 0x0 while trying to handle: vm fault on data at address 0x0 with status 0x4 in thread 0xffffff801ffb5400 "PRIMARY" at address 0x4252ba I loaded the executables which I am trying to spawn into the new processes into the cpio using a variation of the call MakeCPIO(archive.o $;$;...) where SECONDARY and TERTIARY are the executables which I am using later to spawn the new processes. The source code in question worked previously when using Kbuild, so I'm wondering if I'm doing something wrong with the CMake. Does anyone have any ideas? I've gone through the tutorials, but I'm still fairly new to seL4, so any help would be very much appreciated.