You can look into the left panel of this app and check the properties of this query. I'd like you to look at query1.data property, assuming query1 is your REST API query. It seems like it is encapsulated in another array so you will need to find the name of that property.
I would assume since this is a REST API query, it would be {{query1.data.data}} is what you'd like to put in your table's data property.
Let me know if you still have issues and add some screenshots in your current setup.