Hey @MojangSupport. Me and my brother want to play Minecraft together. We have a low end pc so we decided to use open to lan. He can't join my world. What can i do. His username appeared on my list. But i can't join. So when i make a world he can't join either

That definitely sounds frustrating! Are you and your brother playing together at the same location/IP address? This might be causing the issue. Are you or your brother seeing any error messages at all, or does the game just appear to be unresponsive when trying to join? ^FF

Yes we are on the same location/IP address. When i try to join his world a error(unable to join world) shows but when he try to join hy world don't show. We are playing on java edition