Yes finally, i reformatted my sd card and started from scratch, then i installed the latest kosmos, and then i installed the signature patches found here:
https://gbatemp.net/threads/i-heard-that-you-guys-need-some-sweet-patches-for-atmosphere.521164/
(i tried initially to use the kosmos signature patches linked in their repository but they did not work and i got the above error)
Then once I had it installed I booted up Hekate 5.0.2 (latest) and went to payloads and ran fusee-primary payload. This is important because the signature patches i installed work with fuse-primary but not hekate.
After this, i was able to load up goldleaf and install my .nsp file.
I hope this helps!