Invalid properties: output

I make program to control ac with nodered, using IR Transmit.
I had follow this video https://youtu.be/ZiCPfNIP5p8 but stack in this step image
when i tried run in terminal followed this tutorial http://www.piddlerintheroot.com/ir-blaster-lirc/ when i typed : sudo lircd --device /dev/lirc0
there is warning

and when i typed : irsend SEND_ONCE LGE_6711A20015N KEY_O

hardware does not support sending
Error running command: Input/output error

I need suggestion and solusion please.
Thanks.

1 Like

Did you reboot your Pi like is says to?