Why am I not able to download language for speech and language after updated to Windows 10 build 10166?

[Windows Central Question]

I am not able to download language for speech and language after updated to windows 10 build 10166

Yesterday i update my Lumia 730 from win 8.1 to win 10 build 10166. Now i am not able to download language packages. When i try to download it showing error as "Error downloading", because of this cortana is not working in my phone right now. Please help how to get rid from this.