ORA-39126 error on datapump

Hello -

I am getting this error when performing datapump.

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ORA-39126: Worker unexpected fatal error in KUPW$WORKER.UNLOAD_DATA [TABLE_DATA:"SYSTEM"."SYS_EXPORT_FULL_27"]

ORA-04063: package body "SYS.DBMS_SQLDIAG" has errors

ORA-06508: PL/SQL: could not find program unit being called: "SYS.DBMS_SQLDIAG"

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I tried to recompile but unable to compile the package body.

Any feedback and help are appreciated!

Thank you!