How to resolved thickbox styles not loaded properly when enlarging image in opencart templates?

How to resolve enlarging product image issues such as thickbox is not loaded properly in some opencart templates?

To fixed this problem open /catalog/view/theme/your_template_number/template/common/header.tpl, check line 77-81

Then you can remove the condition in order to display this line:

<link rel="stylesheet" type="text/css" href="catalog/view/javascript/jquery/thickbox/thickbox.css" />

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