Fedora 33 : Fixes and changes for wordpress - part 001.

If you have the latest version of WordPress installed, then you may encounter this error when trying to add a new page or post.

Publishing failed. The response is not a valid JSON response.

The problem is with how to edit posts.
One solution would be to install this plugin.
The process of installing the new WordPress or making changes does not allow you to add new plugins to the Plugins menu.
Download the Classic Editor plugin to unzip and then copy it to the plugins folder.

[root@desk mythcat]# cp -r -f /home/mythcat/classic-editor/ /usr/share/wordpress/wp-content/plugins/

Activate this plugin and now you can create and edit pages and posts in WordPress.