ERROR: no binary output function available for type theta_sketch

[biber-baek]

PostgreSQL 15.7
Citus 12.1.-1
datasketches 1.6.0

select version();
                                                 version
---------------------------------------------------------------------------------------------------------
 PostgreSQL 15.7 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44), 64-bit

select  report_date, campaign_id, theta_sketch_get_estimate(theta_sketch_union(reach)) 
 from 
(select report_date,campaign_id, theta_sketch_union(reach_ds) as reach
 from report_day where service_account_id='599267'
 group by report_date, campaign_id,representative_id
 ) a
 group by report_date, campaign_id
order by  campaign_id, report_date
 limit 10;
 
ERROR:  42883: no binary output function available for type theta_sketch
CONTEXT:  while executing command on postgres-citus09:5432
LOCATION:  ReportResultError, remote_commands.c:324
Time: 1248.635 ms (00:01.249)

Hi.

When using parallel aggregate functions on distributed tables in Citus, an error occurs as seen in 'explain analyze'. However, if I run a query without an analyze or use only 'explain', it works fine.