[Tayab]

Here is your problem.

pawn Код:

public BanPublic(playerid) { Ban(playerid); };

Remove the ; sign at the end.

Like this

pawn Код:

forward BanPublic(playerid);
public BanPublic(playerid) { Ban(playerid); }

BanWithMessage(playerid, message[])
{
    SendClientMessage(playerid, 0xFF0000FF, message);
    SetTimerEx("BanPublic", 1000, 0, "d", playerid);
    return 1;
}