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Problem

When creating an HTML Email campaign, the uploaded image URLs may not appear in the email preview or during testing.

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Explanation

The issue occurs when the URL contains parenthesis.

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Solution

Use single quotation marks within the URL() syntax when adding the image, such as for a background color.

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Example

To fix this, wrap the URL in single quotation marks to prevent syntax errors. The correct CSS code should follow this format: 
background-image:
  url('https://abc....');