Twitter button image not loading

Hi

I have update the wordpress with latest version after updating facebook and google plus working fine but twitter image button is not loading…in backend preview section its showing proper but not working in front side…i have shared screenshot below is the link can you please let me know what is the issue

Admin side: https://snag.gy/cQDnoy.jpg

Front side: https://snag.gy/IMbRyK.jpg

Thanks