I am trying to publish Gmail Addon which I create before. I follow that documentation https://developers.google.com/gmail/add-ons/how-tos/publish#publish_an_add-on. According the documentation I am reaching the API Console from Resources > Cloud Platform project. And install the Google Apps Marketplace SDK. I cannot save Configuration because of extension selection. I cannot select Gmail Addon extension checkbox. You can see the image
Do you have any idea how I can solve this?
Cheers.
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