Hello @arunlapog,
Thank you for explaining!
It might be an issue caused by a plugin or your theme.
I recommend installing this plugin: https://wordpress.org/plugins/health-check/
After you install and activate the above plugin it has a Troubleshooting mode which allows you to have a vanilla WordPress session, where all plugins are disabled, and a default theme is used, but only for your user – your visitors will still see the normal website.
Go to its troubleshoot mode and only activate Simple Custom Post Order and see if it works correctly with a default WordPress theme (Twenty Twenty-One for example) and no other plugins.
Please let me know how it goes and what you find!
All the best,
Beatrice.
