[18:27:37] [main/FATAL]: A critical error occurred
net.fabricmc.loader.discovery.ModResolutionException: Found conflicting mods: phosphor conflicts with {starlight @ [*]}
latest.log

Phosphor makes enhancements to the slow vanilla lighting engine to make it faster.
Starlight completely rips out the vanilla lighting engine and replaces it with a completely new even faster system.

Surprised that they don't work together?

This is to be expected, as Starlight and Phosphor modify the same part of the game - the lighting engine. Please remove Phosphor, and no crash should occur

I see, thanks for the explanation