Syslog deployment failure(No syslog entries found!)

I deploy syslog failure according to the document.
Document link:http://www.observium.org/docs/syslog/
The following is my configuration:
(1) /etc/rsyslog.conf:

1. Provides UDP syslog reception
   $ModLoad imudp
   $UDPServerRun 514

(2)/etc/rsyslog.d/30-observium.conf:
#---------------------------------------------------------
#send remote logs to observium

$template observium,"%fromhost-ip%||%syslogfacility%||%syslogpriority%||%syslogseverity%||%syslogtag%||%$year%%$month%%$day% %timereported:8:25%||%msg%||%programname%\n"
$ModLoad omprog
$ActionOMProgBinary /opt/observium/syslog.php

:inputname, isequal, "imudp" :omprog:;observium

#& ~
& stop
#---------------------------------------------------------

(3)/opt/observium/config.php:

$config['enable_syslog'] = 1; // Enable Syslog

[root@observium-server observium]# systemctl restart rsyslog
[root@observium-server observium]# systemctl reload rsyslog
Failed to reload rsyslog.service: Job type reload is not applicable for unit rsyslog.service.

Open the web page of the syslog, an error is "No syslog entries found!"
Please help me.
Thanks!