How to remove code from e-mail? (dynamics 365 Marketing)

Hello community,
I have a problem with marketing e-mail showing the following code after contentblocks and buttons when I choose to open the e-mail in a browser instead of the email client.
The e-mail doesn’t show this code when viewing the e-mail in the e-mail client or in dynamics 365 Marketing. The Code is only visible when I choose to open the e-mail in my browser. I am concerned that people who choose to open the email in their browser will see the code, so I hope someone can help me remove it before the email is sent out.
I have attached an image so you can see the code on the e-mail that i would like to remove.
Thank you!
community post

@Megan_Simioni - I realize that your message came in some time ago. If you’re still having problems, I would be happy to help you out further with this.

Regarding your question, I am not familiar with this specific situation, but I am familiar with HTML. Anything between “” are commented out and will not show up unless you choose to view the actual HTML. How did you build your email message? Did you switch between the contentblocks/buttons and the HTML editor? Sometimes switching between the editors can add unwanted elements into your message.