Application error - Error Handling Publish Arrived for [property] : [null]

Hi,

I am receiving error in publishing data from MQTT to Thingworx Foundation server. "Error Handling Publish Arrived for [property] : [null]"

I can see the values coming in the property every time I refresh it but  it is not saving it in Valustream and keep giving me this error in Application Log.

Initially, I thought the error probably be because the data coming in is in String format and my property type is Integer but even after making required changes I am still getting this error.

I wrote my MQTT scripts which runs a loop and keep sending the data to my MQTT broker.

Regards,

Neetu