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(at)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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