jnd文件上传（blueimp）与zend框架2（zf2）

I am trying to implement jQuery File Upload (blueimp) with zend framework 2.

I put all the js and css files inside public folder and trying to upload the files inside public folder. But unfortunately when I submit the Start upload button its giving below error

SyntaxError: JSON.parse: unexpected end of data at line 1 column 1 of the JSON data

But my browser and server supports json, I have tested.

Its running fine when test for jQuery File Upload (blueimp) demo on my local server.

Please help me if you have any idea.

Thanks in advance.