ispconfig 3.2 fail to create new mailman list

Hi!

my ispconfig 3.2 installation can't create a new list! I don't how long the problem exists as I don't usually create new lists :-/
I'm using Debian 9 (stretch)

steps:
1-create new list in ispconfig GUI.

2- see this messages in system log.
```
Nov 11 08:15:01 vps CRON[18976]: (root) CMD (/usr/local/ispconfig/server/server.sh 2>&1 | while read line; do echo `/bin/date` "$line" >> /var/log/ispconfig/cron.log; done)
Nov 11 08:15:01 vps CRON[18975]: (web64) CMD (XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX)
Nov 11 08:15:01 vps CRON[18977]: (root) CMD (/usr/local/ispconfig/server/cron.sh 2>&1 | while read line; do echo `/bin/date` "$line" >> /var/log/ispconfig/cron.log; done)
Nov 11 08:15:01 vps CRON[18979]: (getmail) CMD (/usr/local/bin/run-getmail.sh > /dev/null 2>> /dev/null)
Nov 11 08:15:01 vps CRON[18978]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Nov 11 08:15:02 vps cron[20388]: Fallo de autenticación
Nov 11 08:15:02 vps CRON[18969]: Fallo de autenticación
Nov 11 08:15:02 vps systemd[1]: Received SIGCHLD from PID 18998 (newlist).
Nov 11 08:15:02 vps systemd[1]: Child 18998 (newlist) died (code=exited, status=1/FAILURE)
```
3- new list doesn't exist, /var/lib/mailman/data/virtual-mailman is not modified.

4- I can create a new list manually by newlist command:
```
newlist [email protected] [email protected] my_password
```

How could check what's wrong?
thanks!

 

wow!
cool!
and thanks!