librenms@librenms:/opt/librenms$ ./validate.php
====================================
Component | Version
--------- | -------
LibreNMS  | 1.45-34-gd3f5dc682
DB Schema | 270
PHP       | 7.2.10-0ubuntu0.18.04.1
MySQL     | 10.1.34-MariaDB-0ubuntu0.18.04.1
RRDTool   | 1.7.0
SNMP      | NET-SNMP 5.7.3
====================================

[OK]    Composer Version: 1.7.3
[OK]    Dependencies up-to-date.
[OK]    Database connection successful
[OK]    Database schema correct
[FAIL]  You have no timezone set for php.
 [FIX]: 
 http://php.net/manual/en/datetime.configuration.php#ini.date.timezone