Procd: Not starting instance syslog-ng::instance1, command not set

Installing and Using OpenWrt
1

Openwrt 19.07.2 syslog-ng start failed, The error log is as follows

Nov 29 20:10:00 1020 crond[1442]: USER root pid 27016 cmd /usr/sbin/logrotate /etc/logrotate.conf
Nov 30 04:10:00 1020 syslog-ng[1476]: syslog-ng shutting down; version='3.25.1'
Nov 29 20:10:00 1020 procd: Not starting instance syslog-ng::instance1, command not set