also get '"org.postgresql.util.PSQLException: ERROR: syntax error at or near "oid"
Position: 343'

for

Users

Groups

with Script Object to Window ( single or multiselect )

also get it if using right click "Table Properties" on a table and then click on the Permissions tab of the Table properties

my SQL Log shows this query as the one that generated the error

SELECT
	((grantee.name)::character varying) AS grantee,
	((nc.nspname)::character varying) AS table_schema,
	((c.relname)::character varying) AS table_name,
	(pr."type")             AS privilege_type,
	(
	CASE 
		WHEN aclcontains(c.relacl, makeaclitem(grantee.oid, u_grantor.oid, pr.
		"type", true))
		THEN 'YES'::text 
		ELSE 'NO'::text 
	END)               AS is_grantable,
	('NO')                  AS with_hierarchy 
FROM
	pg_class c,
	pg_namespace nc,
	(	select
			usesysid oid 
		from
			pg_user 
		union
select
	grosysid oid 
from
	pg_group) u_grantor,
	((	select
			usesysid oid,
			usename rolname 
		from
			pg_user 
		union
select
	grosysid oid,
	groname rolname 
from
	pg_group) 
	UNION
		ALL SELECT
				(0)::oid AS oid,
				'PUBLIC' ) grantee(oid, name) ,
			(((((((((((((	SELECT
								'SELECT') 
			UNION
				ALL (	SELECT
							'DELETE'))) 
			UNION
				ALL (	SELECT
							'INSERT'))) 
			UNION
				ALL (	SELECT
							'UPDATE'))) 
			UNION
				ALL (	SELECT
							'REFERENCES'))) 
			UNION
				ALL (	SELECT
							'RULE'))) 
			UNION
				ALL (	SELECT
							'TRIGGER'))) pr("type") 
WHERE
	(( ((c.relnamespace = nc.oid) AND
	(c.relkind = 'r'::"char") ) AND
	aclcontains(c.relacl, makeaclitem(grantee.oid, u_grantor.oid, pr."type", 
	false))) AND
	(nc.nspname = 'public' AND
	c.relname = 'jontable'));

extractobjectpermissions sql statement for postgresql had incompatibilities for older versions. fixed sql