JSON, not "jason"
It is good you attached your VI, but it is missing data.
Save your JSON string as default data in the control. Or just attach it as a string constant.
Something is wrong in your VI, either in your data or your JSON type cluster.
You must have had error -375006. When I look that up, the error says "the cluster element is not found in the JSON string".
What I noticed in your cluster is that neither string element had a label associated with it. So if your JSON string has a label for the element, (I don't know why it wouldn't), it didn't know how to map those items to a cluster where the elements were defined with empty string names.
