Freeeeeeeeeeeze

recently the game freeze completely several times during the game for 3 or 4 seconds then return and everything changed around me and rarely after freezing the game crash and give me client error 20_0, I didn't change anything in my hardware, software or network just updating the game i uninstalled the game and redownload it without any resolve I hope to find some recommendations that work , thank u crossfire team for the great game