Pgbackrest version 2.28 Bug/Issue

Hi ,

We are getting the below issue while executing the backup through
pgbackrest.

2021-03-02 02:10:01.620 P00 INFO: backup command begin 2.28:
--archive-check --archive-copy --compress --db-timeout=7200
--log-level-console=detail --log-level-file=detail
--log-level-stderr=detail --log-path=/apayrman/pgbackrest/backup/log
--pg1-path=/apayothr/pgsql/12.3/data --process-max=12
--protocol-timeout=9000 --repo1-path=/apayrman/pgbackrest
--repo1-retention-archive=8 --repo1-retention-full=2 --stanza=uatpgdbserver
--start-fast --stop-auto
2021-03-02 02:10:01.622 P00 WARN: unable to check pg-1: [DbConnectError]
unable to connect to 'dbname='postgres' port=5432': could not connect to
server: No such file or directory
Is the server running locally and
accepting
connections on Unix domain socket
"/var/run/postgresql/.s.PGSQL.5432"?
2021-03-02 02:10:01.622 P00 ERROR: [056]: unable to find primary cluster -
cannot proceed
2021-03-02 02:10:01.622 P00 INFO: backup command end: aborted with
exception [056]

DB version :- postgresql 12.3(open source)

OS :- Centos8

Pgbackrest version :- 2.28

Pgbackrest.conf parameters :-

[uatpgdbserver]
pg1-path=/apayothr/pgsql/12.3/data
db-timeout=7200
db1-user=postgres

[global]
repo1-path=/apayrman/pgbackrest
compress=y
retention-archive=8
retention-full=2
process-max=12
log-path=/apayrman/pgbackrest/backup/log
start-fast=y
stop-auto=y
protocol-timeout=9000
archive-check=y
archive-copy=y

Please suggest the solution for above issue.

Thanks,
Singh