Hi there, Thanks for reaching out. These errors are indicative of network issues. These can be caused by problems affecting your brother's specific network hardware, packet loss, or greater issues affecting his ISP which are being passed on to him. To that point, we recommend he consult our [url=https://help.bungie.net/hc/en-us/articles/360049496531-Network-Troubleshooting-Guide]Network Troubleshooting Guide[/url] to explore potential solutions. If that doesn't help, the next step would be checking our [url=https://help.bungie.net/hc/en-us/articles/360049024092-Optimizing-Connections-Improving-Latency-and-Packet-Loss]Optimizing Connections[/url] page. Following that, if issues still persist, we would recommend he reach out to his ISP for more hands-on assistance in troubleshooting his network setup.