This is a recent development and so it cannot be due to improper installation of WordPress. This issue popped up randomly one day. My website was working fine before that. I am facing the same issue on another website which is hosted on another hosting service and has a totally different theme. I have made no major changes to my current website in terms of adding themes, installing plugins etc. The only changes that I have been making are to update pages and adding more content in terms of text and images. A lot of others are facing the same issue, mainly after the last update.
