Suddenly my SSAS Connector showing NetworkIssue

Hi,

Suddently while I was working with PowerBI, I start getting issue.

Then I noticed that I am not able to connect to my on premise SSAS Tabular cube, I tried to launch my Power BI AS connector and even Enterprise gateway but getting NetworkIssue and some big dotnet exception respectively.

Please help or advise, I have tired all whatever I can think of.

Thanks

Nitin Saluja