Can't Add Widget To My Sidebar

Hi,

Appreciate if anyone can help me with this problem. I’m running a self hosted blog, domain name: https://dululainsekaranglain.com/. Recently, I updates my plugins & themes from my dashboard and suddenly my sidebar widgets disappeared. I try to add new widget but somehow I can’t save the changes. I can see all the widgets and drag it to column that I want, click save but nothing happen.

I had tried several solutions such as:

– uninstall all the plugins. I even deleted them from the servers.
– edit in different browsers (Firefox, IE, Chrome)
– change the theme (before this I use Twenty Fourteen)
– re-install WordPress 3.8.1
– etc.

but so far none works.

Currently I’m using QuickPic Theme (temporarily) since it it look nice without any widgets. But, I would love to get back to Twenty Fourteen.

Kindly advise. Anyone?

Thanks in advance.

Ismail N