Using fabric 1.18.2 and tried a couple versions of Mythic Metals but they all crash my game upon starting.
crash-2023-12-04_23.06.27-client.txt

This happens due to you using an outdated version of owo-lib. You need the following version (0.7.2-no-cme): https://www.curseforge.com/minecraft/mc-mods/owo-lib/files/3824297

I am facing the same issue on version 1.20.1 and its still doesn't run properly with the latest versions of the 1.20.1 release

In that case please open a new issue with a new crash log, as these two are unrelated issues

Are you still experiencing this issue? This has not seen some activity in some time, so I will assume it is resolved. If this is not the case, do feel free to re-open it.