Downlink on the Browan TBHH100 Codec Error

Hi I am trying to send a Downlink “00100e 013c00 0201 0301 806b” on Port 204 to the TBHH100 and get the message:

“message_format”: “no decoder defined for codec {codec_id}”,
“attributes”: {
“codec_id”: “tbhh100-codec”

Where do find that codec and how to activate them?

The gateway is a TTig // The Things Indoor LoRaWAN Gateway

Thank you!

Please do NOT double post - it splits the answers across several threads which is not a good use of the volunteers time.