Standard Editor in WordPress

I’m looking at the Standard Editor in WordPress and it is not working for whatever reason. When I use “press this”, the standard editor won’t work. Everything else is all right, but this is the only problem that I’m having for some reason. Any suggestions?

Make sure that you are using the latest version of WordPress. It seems some plugin or theme script is causing the issue.

Please access WP configuration file wp-config.php in your website root directory and set debug property to true.
define( 'WP_DEBUG', true );

And reload the editor, you will get some error message. It may be a theme issue or plugin issue. Fix the issue accordingly.