Snmp work from cli, but it doesn't walk from librenms

i have a problem with add the device in librenms.
I tried to add a Cisco switch with this config on snmp:
snmp-server community public RO

The switch is in the same subnet of librenms, the snmpwalk work but the output of Librenms GUI is:

I try another device but the problem persist.

Could you help me to fix?
Thx you


So from the librenms server you can run : snmpwalk -v 2c -c public OLO-ACCESS

And no problem ?

No problem…