pg_hint_tables

I am trying to use pg_hint_tables in AWS Aurora Postgres.  I changed the Postgres parameter "pg_hint_plan.enable_hint_table = 1".  Then I logout but can't login anymore with the following error message.

“postgres@postgres:[2719]:ERROR:  relation "hint_plan.hints" does not exist at character 21”.

I undo the changes, log back in.  Can't find a good resources that lead me to the root cause.  So I try a few other things, see below.  But no luck.  Any guidance or help is greatly appreciated.

ALTER EXTENSION pg_hint_plan  UPDATE TO '1.4';
GRANT SELECT, INSERT, UPDATE, DELETE ON hint_plan.hints TO PUBLIC;
GRANT USAGE ON SCHEMA hint_plan TO PUBLIC;

Thank you
Kam Fook Wong
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