Sodium Crash: NoClassDefFoundError VertexType When Loading World

What the log looks like

java\.lang\.NoClassDefFoundError: me/jellysquid/mods/sodium/client/model/vertex/type/VertexType
java\.lang\.ClassNotFoundException: me\.jellysquid\.mods\.sodium\.client\.model\.vertex\.type\.VertexType

How to fix it

1. If you have Physics Mod installed, update it to the newest release for your exact Minecraft version (including hotfix builds with letters like 'a' at the end of the version number).
2. Update all other Sodium addons and rendering mods in your mods folder—such as Iris, Indium, Sodium Extra, or custom particle mods—to versions built for Sodium 0.4.9 or newer.
3. If the crash persists and Physics Mod is not installed, check particle-related mods (class_702 in the stack trace is Minecraft's ParticleManager) and remove or update any outdated visual effect mods.
4. If the conflicting mod has no update available yet, either remove that mod or downgrade Sodium to an older compatible build if one exists for your Minecraft version.

Check your own log