Hello annio,
I see your links are not showing 404 errors anymore. Glad everything is ok now.
Hello muprabakaran,
As I see you can simply go to your hosting account, public_html folder, then error folder and simply delete the README file
your pages show 404 – not found error
Go to Settings » Permalinks, and simply click on Save Changes button.
then delete the cookies from your browser with ctrl+shift+del
and this should fix the problem. If not, write back here.