Librenms not detecting my system metrics

I tried to do as the instructions say, put config.php in /data/config but it didn’t work. I set the parameters through the console:
lnms config:set snmp.timeout 5
lnms config:set snmp.retries 10
lnms config:set snmp.exec_timeout 1200

It’s been about 15 minutes, nothing has changed.