I downgraded to 6.4.3, and it’s working. But as on your reply, I updated the PHP version 7.4 to 8.3 and updated the WP version also. But still, the problem persists
Here is the link to a page if you can; please check
https://fiberopticx.com/fiberoptic-system-architectures-topology/
PS. Also, I am seeing this recommendation on the WP site health
“PHP modules perform most of the tasks on the server that make your site run. Any changes to these must be made by your server administrator.
The WordPress Hosting Team maintains a list of those modules, both recommended and required, in the team handbook(opens in a new tab).
Warning The optional module, imagick, is not installed, or has been disabled.”
Is this related to that problem?