Getting error while calling custom action via Powerapps Portal

Hi 


I'm trying to execute the Custom Action via MS Portal, but I'm getting 404 error while calling the action please refer the below ss:- 




Attribute {0} cannot be found for table {1}

innererror: {code: "90040100", message: "Attribute {0} cannot be found for table {1}.", type: "InvalidAttribute"}


Code snippet:- 




Earlier this code was working fine. 

I have also referred the Debajitblog as well but still facing the same issue. 

Any help apricated :) 

Thanks.