Ok, now I get:
Apr 17 16:32:48 ubuntustats telegraf[29556]: 2018-04-17T20:32:48Z I! Loaded outputs: influxdb
Apr 17 16:32:48 ubuntustats telegraf[29556]: 2018-04-17T20:32:48Z I! Loaded inputs: inputs.mem inputs.swap inputs.system inputs.net inputs.snmp inputs.snmp inputs.snmp inputs.cpu in
Apr 17 16:32:48 ubuntustats telegraf[29556]: 2018-04-17T20:32:48Z I! Tags enabled: host=ubuntustats
Apr 17 16:32:48 ubuntustats telegraf[29556]: 2018-04-17T20:32:48Z I! Agent Config: Interval:10s, Quiet:false, Hostname:"ubuntustats", Flush Interval:10s
Apr 17 16:32:50 ubuntustats telegraf[29556]: 2018-04-17T20:32:50Z E! Error in plugin [inputs.snmp]: initializing table : translating: exit status 2: MIB search path: /etc/telegraf/.
Apr 17 16:32:50 ubuntustats telegraf[29556]: Cannot find module (HOST-RESOURCES-MIB): At line 1 in (none)
Apr 17 16:32:50 ubuntustats telegraf[29556]: HOST-RESOURCES-MIB::hrDeviceTable: Unknown Object Identifier
Apr 17 16:33:50 ubuntustats telegraf[29556]: 2018-04-17T20:33:50Z E! Error in plugin [inputs.snmp]: initializing table : translating: exit status 2: MIB search path: /etc/telegraf/.
Apr 17 16:33:50 ubuntustats telegraf[29556]: Cannot find module (HOST-RESOURCES-MIB): At line 1 in (none)
Apr 17 16:33:50 ubuntustats telegraf[29556]: HOST-RESOURCES-MIB::hrDeviceTable: Unknown Object Identifier