[Konstantinos]

You don't close the bracket before else "}"

pawn Код:

// Code above..
        if(gTeam[playerid] == TEAM_BLUE || gTeam[playerid] == TEAM_GREEN)
        {
            if(Checkpoint)
            {
                SendClientMessage(playerid,OBJECTIVE_COLOR,"Wait 20 seconds.");
                captureTimer = SetTimerEx("SetZone",20000,false,"i",playerid);
            } // <-
            else
            {
                SendClientMessage(playerid,OBJECTIVE_COLOR,"Your team has captured this flag, you dont need to do this again.");
            }
        }
    }
    return 1;
}