I have the same issue. After searching in the code, I found that the problem is caused by the lines 31-33 in file plugins/sc-catalog/sc-catalog-admin.php
wp_enqueue_script( 'autocomplete',
plugins_url( 'jquery-ui-1.8.17.autocomplete.min.js',
__FILE__ ) );
If I remove these lines, actually I cannot input image or media in product description. Any opinion about this ?