Strange, Lithium keeps restarting itself after the Kosmos Splashscreen.
I use the special Hekate build posted here with Kosmos 12.1.2, so as I understand it, it should work.
My Switch is on FW 7.01. Maybe someone could point me to the solution please.
Oh, and Lithium version is 1.57.
Did you include the update.bin.sig file that accompanies update.bin?