Error Gsheet add-on

Hi guys, I'm trying to send data from a google sheet through the add-on but it doesn't work, it remains blank when I send a test.

Is there a way to correct it?

regards.

Dario.

Setit up in Incognito mode. Sometime this issue occurs when there are multiple gmail account are added in the same browser.

Incognito mode setup should make you able to see Successful message in Red Color text when you click on Send Test.