Thank you for reaching out in the Community! I am sorry you are having an issue with your custom code email. It literally may be a space in front of something like a URL or another element where it should not be. It might be best to call in to our Support center and talk directly to someone that can look at your code for you to find the actual error more quickly.
In the meantime, please feel free to reach out to us for anything else you may need. Have a great day!
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