The 58 client expects specific packet structures. If you use a 2.7 server core with a 1.9 client, movement packets desync.
Outside of gaming, "Aion" as a brand appears in various professional contexts that might overlap with creative "client work": aion 58 client work
: Contains the core executables ( aion.bin ) and dynamic link libraries ( .dll ) required to launch the game. Version 5.8 features improved 64-bit stability compared to earlier 4.0-era clients, allowing for better RAM utilization. The 58 client expects specific packet structures