When making changes to your theme settings in the theme editor , you might see an 'HTML error found' warning message in the editor: This error message appears when a syntax error is found in your theme code. To resolve the problem, you can examine the code in the Liquid file that is referenced in the error message. In the example above, this would be the slideshow.liquid . Finding the problem in your theme code Click on the .liquid section file that is linked to in the error message. This will take you to the Edit HTML/CSS page , and the file will open in the code editor. Look through the code in the file and try to find invalid HTML or Liquid. The code editor will show potential syntax errors in red. Common problems include the following: Extra closing HTML tags, for example, a closing </div> without an opening <div> Extra unclosed HTML tags, for example, an opening <div> without a closing...