Fixing the Roblox VR Script Undefined Error for Good

If you've been working on a project and suddenly see a roblox vr script undefined error in your output window, it can be a total headache to track down. It's one of those bugs that usually pops up right when you think you've finished your code, and it honestly feels like the engine is just messing with you. Usually, "undefined" (or nil in Lua terms) means you're trying to talk to something that doesn't exist yet, or the script is looking for a VR headset that isn't even plugged in. ...

February 7, 2026 · 7 min · Suarez Arnold