It closes directly when im launching the game even on the original .exe file

[Abdoujumper]

here's the error : Exception raised at 0x0000000000000000 in hl2_win64.exe: 0xC0000005: Access violation during execution at location 0x0000000000000000.

[TorutheRedFox]

Where is that exception raised?

[JohnMega]

You also need to create server solutions, not just client solutions. Make sure that server.dll and client.dll exists