fix lotus interface

tangostationcontrol/devices/sdp/statistics.py

@@ -189,7 +189,7 @@ class Statistics(OPCUADevice):
 
                     # decode payload
                     try:
-                        message = json.loads(payload.decode())
+                        message = json.loads(payload)
                     except (json.decoder.JSONDecodeError, UnicodeDecodeError):
                         logger.exception(
                             f"Could not decode message payload as JSON {topic=} {message=}"