Thank you for the response.
In my case, the plugin doesn’t show posts in sidebar. Instead, it shows number of views only with each post. What I need is, show posts in sidebar on the basis of post views or number of comments. To achieve this, I need to know the meta_key that is storing the number of views. Can you tell me the meta_key? And guide how can I use this plugin in my sidebar widget (that is sorting posts on comments count but not sorting on the basis of post views). If you say, I can share the widget code with you. Thank you.