Default I'm not using a pirated version of SA. I thought there is a problem with the Steam version, so i downloaded pirated versions of the game, but it didn't work either. I tried to verify the game files on Steam, but everything's fine.
This problem started one day to another, only on this server.
I checked my SSD's condition in Samsung Magician. I did the few minute short test, and the few hours long test. It showed the SSD is in perfect condition. Any of my computer's parts are working perfect. I didn't think this is my problem. For example I play Indiana Jones: The Great Circle daily, about 3-4 hours. My GPU is on an OC profile. It doesn't crash, and I have about 60 FPS.
So back to the main subject, all of my computer parts are working fine. My windows is an original Windows 11 Pro 64-bit that I bought from Xupe (Hungarian online store).
I don't have any virus. I have Malwarebytes and Norton installed, and runned a full scan in both, and it didn't show anything.
PS: I talked with one of my friends, who plays on this server. He said, he had that problem, and the monthly update fixed it.