Hi Shameem,
I tried contacting woocommerce, and they said its not their issue,
I contacted Instamojo, they said its not their problem.
Now, I deactivated one more product called product adding for woocommerce, and it solved the issue.
But the problem resolution is temporary. Last time it was social login plugin which was causing the issue, now it is some other one. Why the virus or hack is changing plugins? and my question us how come different plugins which we once working well without any update, Start causing issues?
The product add-on plugin was working fine till yesterday!
Something is wrong somewhere I am not able to figure out.