Hi @ganesh79!
I see that you’re running the latest version of the plugin, which is also working fine. That’s a good place to start, so here are the options I’d like you to try out.
First off, try deactivating all plugins except Jetpack. If that resolves the issue, reactivate each one individually until you find the cause.
If that doesn’t resolve the problem, try to temporarily switch your theme to Twenty Sixteen and see if the problem persists. You’re welcome to use the Theme Switcha plugin to do that:
https://www.ads-software.com/plugins/theme-switcha/
This plugin let you change themes without it affecting the way users see your site.
If neither of those make any difference, the next step is to download WordPress again, access your server via SFTP or FTP, or a file manager in your hosting account’s control panel, and delete then replace your copies of everything on the server except the wp-config.php file and the /wp-content/
directory with fresh copies from the download. This will effectively replace all of your core files without damaging your content and settings.
Some uploaders tend to be unreliable when overwriting files, so don’t forget to delete the original files before replacing them.
Let me know how you get on with that. Thanks!