tExtractJSONFields returns null values after extracting fields of a json file

[Anonymous]

Hello community
I am using tFileInputJSON to get my json file and i passed this file to tExtractJSONFields to extract fields values but the values are null 

this is my BDConnection

this is my tFileInputJSON and the json file 

this is my tExtractJSONFields  

this is the result

i want to know why it returns null values 

Can someone please help me with this?

Thanks