When i tried quering the salesforce object with linked logged in environment, I'm facing error message saying Service was temporarily interrupted or is unavailable. Please try again in a moment."
I've seen a report of a major AWS outage today in the East coast server farm. Along with reports that Heroku/Heroku Connect is also affected. It is unclear if they are related or not.
A Heroku issue would well affect the hosted version of workbench that Salesforce provides.
The Heroku Status page is showing an issue being investigated.