Quickstart Java SDK is not working

Hi All,

I downloaded a quick start java app from docusign developer portal and it was working fine till last week. When i tested today, it is not working.  It does not throw any exceptions or error.  When running the main class, the program simply terminates without providing any message or error.  

The file to sign will be fetched from a local folder, convert into base64 then send it to the API functions.  

When it enters the below lines of code, the entire program simply terminates and no code below these lines are getting executed.

EnvelopesApi envelopesApi = new EnvelopesApi(apiClient);

EnvelopeSummary results = envelopesApi.createEnvelope(accountId, envelope);

Can someone please guide me on this?