[JJB562]

Although, you should always post the full code and explain your error, I could see the problem by just looking at the code.

pawn Код:

if(Masked[playerid] == true) // You had a ';' after the parentheses ')', and instead of '==', you put '='.
    {
        format(string, sizeof(string), "Stranger %d says: %s", PlayerInfo[playerid][pMaskID], text);
    }
    return 1;
}