PLS-00201: identifier 'SYS.LT_EXPORT_PKG' must be declared

Error Description:

I have noticed the below error during export schema using exp utility:

Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses WE8ISO8859P1 character set (possible charset conversion)
. exporting pre-schema procedural objects and actions
EXP-00008: ORACLE error 6550 encountered
ORA-06550: line 1, column 13:
PLS-00201: identifier 'SYS.LT_EXPORT_PKG' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
EXP-00083: The previous problem occurred when calling SYS.LT_EXPORT_PKG.schema_info_exp
. exporting foreign function library names for user SCOTT
. exporting PUBLIC type synonyms
EXP-00000: Export terminated unsuccessfully

Solution I tried:

Step 1: Login as SYSDBA
Step 2: GRANT EXECUTE ON sys.lt_export_pkg TO PUBLIC;
Step 3: Re-Run export