Hi Guy,
In file: /public_html/plugins/system/yt/yt.php and find the code, please remove:
// Frontend
/* if($app->isSite()){
// Remove default mootools
unset($doc->_scripts[JURI::root(true) . '/media/system/js/core.js']);
unset($doc->_scripts[JURI::root(true) . '/media/system/js/modal.js']);
unset($doc->_scripts[JURI::root(true).'/media/system/js/caption.js']);
unset($doc->_scripts[JURI::root(true) . '/media/system/js/mootools.js']);
unset($doc->_scripts[JURI::root(true).'/media/system/js/mootools-core.js']);
unset($doc->_scripts[JURI::root(true).'/media/system/js/mootools-more.js']);
unset($doc->_styleSheets[JUri::root(true) . '/media/system/css/modal.css']);
if (isset($doc->_script) && isset($doc->_script['text/javascript']))
{
$doc->_script['text/javascript'] = preg_replace('%window\.addEvent\(\'load\',\s*function\(\)\s*{\s*new\s*JCaption\(\'img.caption\'\);\s*}\);\s*%', '', $doc->_script['text/javascript']);
$doc->_script['text/javascript'] = preg_replace('%new JCaption\(\'img.caption\'\);%', '', $doc->_script['text/javascript']);
//remove SqueezeBox.initialize in behavior.php
$doc->_script['text/javascript'] = preg_replace('%window\.addEvent\(\'domready\',\s*function\\(\\)\s*\\{SqueezeBox\\.initialize\\(\\{\\}\\);\s*SqueezeBox\\.assign\\(\\$\\$\\(\'a\\.modal\'\\), \\{parse: \'rel\'\\}\\);\\}\\);\s*%', '', $doc->_script['text/javascript']);
if (empty($doc->_script['text/javascript']))
unset($doc->_script['text/javascript']);
}
} */
Thanks & regards!