I’m having the same issue after updating my firmware, I’ve updated all of the requirements (Atmosphere, Hekate, Sigpatches) and I’m still getting a yellow screen. Is there anything I can do or am I screwed?
I was having the same issue, managed to fix.
Here's a step by step what happened to me:
Updated Hekate, rebooted, all fine
Updated Atmosphere, rebooted, all fine
Updated Sigpatches, rebooted, all fine
Updated firmware to 18.1.0 , rebooted, yellow screen
Tried removing contents folder, didn't work, tried removing anything related to sigpatches, didn't work, tried copying fusee.bin (forgot before) to root (as payload.bin) and to hekate payloads folder, didn't work, then lastly I decided to copy the atmosphere update again to my SD and overwrite everything again, that worked.
Not sure what went wrong after updating the firmware, but that's how I solved my issue here, hope it helps someone.