multiplayer, tModLoader, Steam, lost connection, joining game, troubleshooting, network issues, server timeout, firewall settings, port forwarding, verify game files, mod compatibility, update mods, stable internet connection, co-op, Terraria modding, reconnect attempt, host & play, direct IP connection, Steam friends list, invite system, error message, detailed logs, technical support, community forums, game patch, dedicated server software, latency optimization, enhanced multiplayer experience.