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I’m trying your plugin and have followed the steps for setting up the Gmail SMTP and all went well until I clicked on “Allow plugin to send emails using your Google account.” Doing this, I get the following message from Google. Clicking on Request Details displays the client_id as blank. Please advise.
400. That’s an error.
Error: invalid_request
Missing required parameter: client_id
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Request Details
That’s all we know.