S2120 Payload showing blank

[ThinLizzy13]

My S2120 is sending regular messages in 5 minute intervals. Always the same but with no values.

"decoded_payload": {
"err": 0,
"messages": [],
"payload": "4A00F136000000000000004B004E0000000026FB4C0000000001FC",
"valid": true
},