Just updated to 8.0 and ran it fine on OFW before, now I tried to get Atmosphere running again, but can't boot it. Always get unknown pgk1 Error on Atmosphere and Hekate.
It is a old Switch.
It is a old Switch.
Have you updated your Atmosphere and Hekate files as well?

Edit: OK, nevermind, I followed the basic instructions in switchgui.de and wasn't doing it right. I needed to use Launch > Payloads > fusee-primary in Hekate. Just saying in case someone has this problem too.