Problem still persist. I enabled debugging and got below error is this the reason ?
Notice: Function WP_Block_Patterns_Registry::register was called incorrectly. Pattern content must be a string. Please see Debugging in WordPress for more information. (This message was added in version 5.5.0.) in /home/u163463985/domains/lightgrey-capybara-476743.hostingersite.com/public_html/wp-includes/functions.php on line 6114
If on the default theme the issue persists, then this is something related to WooCommerce so I suggest you contact their support for further solutions.
The issue has been fixed it was database table corruption issue (woocommerce_orders_itemmeta) i repaired it via phpmyadmin and now everything working fine.