Site displaying blank page

You might take a look at the server logs to see what errors appear there. Should be under /var/log/apache2/error.log if you're running apache or in /var/log/nginx/error.log.

The problem is likely related to permissions on the storage folder, so you should ensure it has proper permissions for writing. 755 should suffice, but 777 otherwise.

https://laracasts.com/discuss/channels/servers/running-on-local-white-screen-on-live-server

might be the same issue?

I have a Windows server so I cannot change the permissions. Also I couldn't see the error logs in that path. Is there something else I can do?

I'm not sure, @sahajbedi. You might try reaching out to NS support to see if they can assist you. Someone with Windows server experience might chime in here. Good luck!