I have a Google sites which has a custom built gadget. I have a Google login for the same and it gets data from a specific spreadsheet. It works fine for one single gadget included in a page without setting an origin in Google Developer's Console. However, when I insert the gadget into another page of the same Google sites; it gives me an origin mismatch error in the console.
FYI, Google renders each gadget as an iframe.
Please help me with this.