League of Legends Vanguard Error Keeps Kicking Me Out After the Latest Patch

I have been playing League of Legends for about eight years, and until now I had never encountered a problem like this. After the latest patch, I started receiving a Vanguard error on my laptop, and because of this error I keep getting kicked out of the game and cannot play properly.

Experiencing such a critical error after a recent update in a well-established game that has been played for many years is extremely disappointing. I want to log in and play the game, but because of the Vanguard issue the game has become unplayable.

I want the Vanguard error to be fixed as soon as possible. If this issue is not resolved in a short time, I am considering deleting the game completely.