The New Buttom doesn't work

It's ok with new version, thanks for your support !!!

We have fixed the issue in latest version, Please download and install it on your site. If It still does not work for you, Please send us your back end & FTP login credentials via Contact Us form, We'll look into it.

Same problem with me..

I can't create or copy or anything else new, and it worked before.

Though we have already fixed the issue in latest version and If It's still not working for you, Please send us your back end & FTP login credentials, We'll look into it.

The New Buttom or any buttom of administrator (in vQuiz) don't work.

Buttons worked before, but now do not work.

I update to vQuiz 2.0.1, but but still does not work.

Can you help me?

Joomla! 3.4.3
vQuiz 2.0.1