Hi,

Have you try deactivate all plugins ( except plugins come from the theme: Visual Composer & Penci Framework ) and try it again? If it work, let's enable each plugin to check what's plugin caused this issue.

If it still doesn't work, let's send me your admin url and admin account ( username and password ) - in a private reply. I will take it a look help you.

Best Regards,

PenciDesign