To get the Boombox, you must buy the Boombox gamepass for 300 Robux. This can be found either in the in-game storeunder the Robux section or under Evade's store in the main Roblox menu.

Error 400 in Roblox, Explained In a nutshell, Error 400 crops up due to a number of system-wide reasons, but they largely pertain to issues with the Roblox online servers.