Error While Activating Email Template for Automation in Account Engagement

Hi, I’m trying to use an Email Template in Account Engagement (formerly Pardot), but I’m running into an issue that prevents me from activating the email content. Despite selecting a campaign, a tracker domain, and users for both sender and reply-to, I still get the error message and can’t proceed. Could you help me understand what might be causing this error and how I can resolve it so I can successfully send emails?

For referrence I am attaching the screenshot   

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