This is the magic trick. CSP allows you to lie to the server about your version to maintain compatibility.
By doing this, your game (running on 1.16.4 + CSP 0.2.x) tells the server: “Hello, I am version 1.16.3.” The server accepts the handshake, and you join.
Many sim racers think, "It's just one car. I'll drive something else." assetto corsa is obsolete v1.16.3 is required
But ignoring this error can lead to knock-on crashes. If you load a track that has an encrypted sponsor billboard (yes, this happens) or join a multiplayer server running an encrypted car pack, the error will crash your entire game, not just the car.
Furthermore, if you are a league racer, your league will likely require v1.16.3 for anti-cheat compatibility. Running a modified .exe can get you banned from SGP (SimGrid) or LFM (Low Fuel Motorsport). This is the magic trick
Kunos Simulazioni’s final update (1.16.3) fixed:
Racing without it means missing these fixes and being unable to join 90% of active online servers. By doing this, your game (running on 1
You have three solutions, ranging from the simple to the nuclear. Start with #1 and work your way down.
If you use Content Manager (and you should be), you can force a clean install of the game kernel.