Test to mail failed

Help
1

After upgrading to the below version, email transport fails with the following error:

Test to mail failed
Invalid address: (addAnAddress to): 0

[root@xxxx librenms]# ./validate.php

Component Version
LibreNMS 1.43-89-g22f0791
DB Schema 267
PHP 7.2.8
MySQL 5.6.30
RRDTool 1.4.8
SNMP NET-SNMP 5.7.2

====================================

2

Add a default contact or disable sending email to default contact

3

yep, did it , works perfect

4