Text coding sections not appearing

Text coding sections are not appearing in the preview or the test email. I’m assuming because there is a problem with the code? I have added and tags and have also removed them. I am not a coding expert and I have tried troubleshooting the issue with what I know but with no luck. Please help

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Have you tried actually sending the email to someone rather than using test in a matter of interest?

When you say text coding, are you talking about the dynamic content via liquid or HTML you have dropped in a code block? Either way can you show us the code?