Missing dependencies

Crash: NoClassDefFoundError: net/caffeinemc/mods/sodium/api/memory/MemoryIntrinsics

What the log looks like

java\.lang\.NoClassDefFoundError: net/caffeinemc/mods/sodium/api/memory/MemoryIntrinsics

How to fix it

  1. If you are using Oculus on Forge 1.20.1 (such as Oculus 1.8.0+), download and install the latest version of Embeddium for Minecraft 1.20.1.
  2. Open your `mods` folder and delete Rubidium or any outdated versions of Embeddium, as Rubidium does not include the `MemoryIntrinsics` API required by newer Oculus builds.
  3. If Sinytra Connector is installed on Forge 1.20.1, check your `mods` folder and remove any Fabric-only rendering mods like Iris or Fabric Sodium, keeping only Forge-native Embeddium and Oculus.
  4. If you are playing on Fabric, Quilt, or NeoForge 1.21+, install Sodium or update both Sodium and your shader/rendering mods (Iris, Entity Texture Features) so their versions match.
LoadersForge, Neoforge, Fabric, Quilt
SeverityStops the game
CategoryMissing dependencies

Check your own logDownload sodium on 9Minecraft

Related errors

Missing dependenciesA library mod is missing (Architectury, Cloth Config, Curios, Placebo…)The missing class path names the library: dev/architectury → Architectury APIMissing dependenciesBuildCraft Additions Crash When Opening Inventory (EurekaAPI)Install the Eureka library mod (by AEnterprise) for Minecraft 1.7.10 into your mods folder so eureka.api.EurekMissing dependenciesContradictionException — the mod set cannot be solvedTwo mods demand versions of the same dependency that cannot both be trueMissing dependenciesFabric RendererAccess.getRenderer() is null (Missing Indium)Check your Sodium version in your mods folder: if you are using Sodium 0.5.11 or older (common on Minecraft 1.Missing dependenciesFabric: incompatible mod set, a required mod is missingRead the indented block under "Incompatible mod set" — it names every missing modMissing dependenciesForge: missing or unsupported mandatory dependenciesEach line names: the missing mod, who asked for it, and the version range