Add to watchdog cluster request is rejected by node

Hi all,

I have the following error with my pgpool-II standby. how I can fix it?

Jun 11 08:57:04 asa-pgpool02 pgpool[3240]: [1-1] 2018-06-11 08:57:04: pid
3240: WARNING: checking setuid bit of if_up_cmd
Jun 11 08:57:04 asa-pgpool02 pgpool[3240]: [1-2] 2018-06-11 08:57:04: pid
3240: DETAIL: ifup[/sbin/ip] doesn't have setuid bit
Jun 11 08:57:04 asa-pgpool02 pgpool[3240]: [2-1] 2018-06-11 08:57:04: pid
3240: WARNING: checking setuid bit of if_down_cmd
Jun 11 08:57:04 asa-pgpool02 pgpool[3240]: [2-2] 2018-06-11 08:57:04: pid
3240: DETAIL: ifdown[/sbin/ip] doesn't have setuid bit
Jun 11 08:57:04 asa-pgpool02 pgpool[3240]: [3-1] 2018-06-11 08:57:04: pid
3240: LOG: waiting for watchdog to initialize
Jun 11 08:57:04 asa-pgpool02 pgpool[3241]: [3-1] 2018-06-11 08:57:04: pid
3241: LOG: setting the local watchdog node name to "
asa-pgpool02.adm.cacc.ch:5432 Linux asa-pgpool02"
Jun 11 08:57:04 asa-pgpool02 pgpool[3241]: [4-1] 2018-06-11 08:57:04: pid
3241: LOG: watchdog cluster is configured with 1 remote nodes
Jun 11 08:57:04 asa-pgpool02 pgpool[3241]: [5-1] 2018-06-11 08:57:04: pid
3241: LOG: watchdog remote node:0 on asa-pgpool01.adm.cacc.ch:9000
Jun 11 08:57:04 asa-pgpool02 pgpool[3241]: [6-1] 2018-06-11 08:57:04: pid
3241: LOG: interface monitoring is disabled in watchdog
Jun 11 08:57:04 asa-pgpool02 pgpool[3241]: [7-1] 2018-06-11 08:57:04: pid
3241: LOG: watchdog node state changed from [DEAD] to [LOADING]
Jun 11 08:57:04 asa-pgpool02 pgpool[3241]: [8-1] 2018-06-11 08:57:04: pid
3241: LOG: new outbound connection to asa-pgpool01.adm.cacc.ch:9000
Jun 11 08:57:04 asa-pgpool02 pgpool[3241]: [9-1] 2018-06-11 08:57:04: pid
3241: *FATAL: Add to watchdog cluster request is rejected by node
"asa-pgpool01.adm.cacc.ch:9000 <http://asa-pgpool01.adm.cacc.ch:9000>"*

pgpool-II version :
pgpool-II version 3.7.3 (amefuriboshi)

Thanks.