SQL & PL/SQL

hi i have the following trigger

create or replace trigger emp_sub
  before insert
  on employee  
  for each row
    
  
  nRow         department%ROWTYPE;
lnRow2        jobs %ROWTYPE;
lnCount       NUMBER:=-1;
lnSin       varchar2(20);
vempid   number;
  
declare
   SELECT COUNT (*)
     INTO lnCount
     FROM employee a,
          (SELECT *
             FROM XMLTABLE ('/message'
                            PASSING :NEW.MESSAGE
                            COLUMNS "empid" VARCHAR2 (4) PATH 'empid')) b
    WHERE A.empid = vempid ;
  
if lnCount = 0 then
  p_lsg := 'Record not found';
  return;
  end if;
end;

am geting this error ORA-04071: missing BEFORE, AFTER or INSTEAD OF keyword