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@@ -316,7 +316,7 @@ function returnThumbnail($course)
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$html .= '<div class="image">';
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$html .= '<img class="img-responsive" src="'.$course_medium_image.'" alt="'.api_htmlentities($title).'"/>';
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- $categoryTitle = $course['category'];
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+ $categoryTitle = isset($course['category']) ? $course['category'] : '';
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if (!empty($categoryTitle)) {
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$listCategory = CourseManager::getCategoriesList();
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$categoryTitle = $listCategory[$categoryTitle];
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