As the title says, Supplementaries, supplementaries-1.19.2-2.2.52-fabric.jar has a dependency upon Moonlight Lib v2.2.13 - as far as I can tell, that file on CurseForge's website is only valid for Forge.

Currently using the latest Fabric versions of both Supplementaries and Moonlight Lib

Log: latest.log

Minecraft 1.19.2
Medieval MC [FABRIC] modpack, v18.5
Fabric 0.14.14

I tried manually resetting the dependency back to v2.2.12, but Supplementaries is still failing - Supplementaries and Moonlight Lib are the two mods in the stack trace. I guess the Fabric version really needs something in the newer, but not yet available for Fabric, Moonlight Lib.

Crash Log: crash-2023-02-27_19.39.23-client.txt

Maybe I'm just impatient...
Looks like the Fabric version of Moonlight Lib v2.2.13 was just pushed to CurseForge. Using the new version got me past the startup crash.

Cueseforge moment