Argument Too Large Error in Merge Status
If you encounter the "Argument Too Large: subject" error in your merge status, it typically means that the email subject in your Gmail draft exceeds the allowed character limit.
The maximum length for the subject is 78 characters, including any merge tags you may have included. To resolve this issue, review your email subject and ensure it meets this character limit.
Once you have shortened the subject accordingly, you should be able to proceed without further issues. If you require additional assistance, please feel free to reach out to our support team.