Sword Factory GUI invalid code issue (Image via Roblox) Roblox codes may stop working for a variety of reasons. A common problem is that codes frequently include time limits and may have expired ...

Learn how to get free robux in Roblox with our 3 easy methods. See which method works for us, read our quick guide now.

Launch Rune Gui in Roblox.; Once you are at the main menu, press the codes (ABX) button in the lower right corner. The text box will appear. Copy and paste the code you want to use.