Missing dependenciesA library mod is missing (Architectury, Cloth Config, Curios, Placebo…)
What the log looks like
java\.lang\.noclassdeffounderror: *(?:dev/architectury|me/shedaniel/clothconfig|top/theillusivec4/curios|shadows/placebo|com/llamalad7/mixinextras|dev/emi/emi|mezz/jei|io/github/fabricators_of_create)
noclassdeffounderror[^\n]{0,80}(?:architectury|clothconfig|curios|placebo|mixinextras)
How to fix it
- The missing class path names the library: dev/architectury → Architectury API
- Install that library for your loader and Minecraft version
- Library mods are per-loader: the Fabric build will not work on Forge
| Severity | Stops the game |
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| Category | Missing dependencies |
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Check your own log