Having trouble playing Roblox? Here's what you need to know about error code 103.

Basic Reinstall: Uninstall Roblox through your control panel (or Apps settings) and then download and install a fresh copy from the Roblox website. This is your first line of defense.

So, to fix this error, check your internet connection and make sure the game servers are not down at the moment. Now read: Fix Roblox Error Code 103 and Initialization Error 4.