Hindi font gone astray

Hi,

Since two days, my articles which are in Hindi (an Indian language) have gone astray. There is some problem in fonts/formatting which I’m unable to understand. I only question marks instead of text. They were working fine previously. Any suggestions what I can do?

Example Link: https://www.feminisminindia.com/2016/07/01/%E0%A4%95%E0%A4%B5%E0%A4%BF%E0%A4%A4%E0%A4%BE-%E0%A4%96%E0%A5%87%E0%A4%B2-%E0%A4%B8%E0%A5%80-%E0%A5%9B%E0%A4%BF%E0%A4%A8%E0%A5%8D%E0%A4%A6%E0%A4%97%E0%A5%80/#.V71VTPl97IU