Failed to verify connection 'My Google connection'

@Make_Money
Hi, Perhaps you should look at the Help Center below.
https://www.make.com/en/help/apps/productivity/google-sheets#create-and-configure-a-google-cloud-platform-project-for-google-sheets

I compared the screenshots you posted with the Help Center and there seem to be some differences.

Configure your OAuth consent screen for Google Sheets

  1. In the Data Access section, click Add or remove scopes, add the following scopes: > 11.
    https://www.googleapis.com/auth/spreadsheets
    https://www.googleapis.com/auth/drive

Create your Google Sheets client credentials

  1. In the Authorized redirect URIs section, click + Add URI and enter the following redirect URI
    https://www.integromat.com/oauth/cb/google/

I’m not sure what the correct Redirect URI is, but the following answer may be helpful.