Fine uploader message error - yii

Question

I am using yii framework with fine uploader. When i moved my project on a new server I suddenly got this message error in console:
Error: element not found file
throw new Error('element not found ' + type);
This is the code why I'm getting the error. But I don't understant what this do(this is from the library fine uploader)
_find: function(parent, type){
var element = qq(parent).getByClass(this._options.classes[type])[0];
if (!element){
throw new Error('element not found ' + type);
}
return element;
},
this is the php code:
<?php
$this->widget('ext.fineuploader.EFineUploader', array(
'id' => 'FineUploader',
'config' => array(
'autoUpload' => true,
'text' => array(
'uploadButton' => 'Adaugă CV'
),
'request' => array(
'endpoint' => $this->createUrl("/cariera/uploadTmpFile"),
'params' => array('YII_CSRF_TOKEN' => Yii::app()->request->csrfToken),
),
'retry' => array('enableAuto' => false, 'preventRetryResponseProperty' => true),
'chunking' => array('enable' => true, 'partSize' => 100), //bytes
'callbacks' => array(
'onComplete' => "js:function(id, name, response){ "
. " if(response.success){"
. " $('#Candidate_cv_path_em_').hide();"
. " $('#Candidate_cv_path').val(response.folder+'/'+name);"
. " var width = $('.qq-upload-button > div').width();"
. " if($('.qq-upload-button > div.progressBar')){"
. " $('.qq-upload-button > div.progressBar').remove();"
. " }"
. " $('.qq-upload-button').prepend('<div class=\"progressBar\"></div>');"
. " $('.qq-upload-button > div.progressBar').animate({width: '150px'}, 1000, function(){ $('.qq-upload-button > div').html('CV atașat'); });"
. " }"
. "}",
'onError' => "js:function(id, name, errorReason){ $('#Candidate_cv_path_em_').html(errorReason).show();}",
),
'validation' => array(
'allowedExtensions' => array(),
'sizeLimit' => 2 * 1024 * 1024, //maximum file size in bytes
'minSizeLimit' => 1, // minimum file size in bytes
'acceptFiles' => 'application/pdf, application/vnd.openxmlformats-officedocument.wordprocessingml.document,application/msword'
),
)
));
echo "<span class='info_upload'>(.pdf, .doc, .docx)</span>";
// echo $form->error($applicant, 'cv', array('class' => "errorMessage errorCv"));
// echo $form->labelEx($applicant, 'cv', array('label' => '<span class="progressBar"></span>Upload CV', 'class' => 'uploadcv'));
// echo $form->fileField($applicant, 'cv', array('size' => '1', 'class' => 'hiddenInputFile'));
?>
Can someone help me with this ?
Update:
I noticed that it is not generated this html part on the new server:
<ul class="qq-upload-list">
<li class=" qq-upload-success">
<div style="display: none; width: 100%;" class="qq-progress-bar">
</div>
<span style="display: none;" class="qq-upload-spinner"></span>
<span class="qq-upload-finished"></span>
<span class="qq-upload-file">free_cv_sample_template.pdf</span>
<span style="display: inline;" class="qq-upload-size">0.1MB</span>
<a style="display: none;" class="qq-upload-cancel" href="#">Cancel</a>
<a class="qq-upload-retry" href="#">Retry</a>
<a class="qq-upload-delete" href="#">Delete</a>
<span class="qq-upload-status-text"></span>
</li>
</ul>
Why ?