Fix #1: Use a non-child account. The most common reason why many people are unable to join a game and encounter the Roblox error code 103 is an issue with their account.

As mentioned, this seems to be an issue that primarily targets Xbox One users. If the above steps fail, be sure to reach out to Roblox’s support team for more help.

Here are the working solutions to fix Age Restriction Error 103 and Initialization Error 4 for Roblox on Xbox One or Windows PC.

Learn how to fix the Roblox 106, 110, 116 - Your Xbox account settings prevent you from playing user generated content errors on Xbox One and on Windows 10.

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.