inaki81

Hello,

How did you manage to recover the content affected by this problem?

Hello,

Have you found a way to fix it without losing the content?

Hello,

Have you found the way? I am interested in the answer.

I solve it.

In permalinks, I selected “post names” option again and save.

That was it, I read it in a youtube video comments and it worked.

Thank you for your reply, @bcworkz. It was very helpful to me.

I managed to add a new metabox with a rich text editor with the following code, but I can’t do it with the already created metabox. Would you know how to do it with the existing metaboxes?

function wporg_add_custom_box() {
	$screens = [ 'post', 'wporg_cpt' ];
	foreach ( $screens as $screen ) {
		add_meta_box(
				'my_metabox_id',                 // Unique ID
				'my_metabox',      // Box title
				'wporg_custom_box_html',  // Content callback, must be of type callable
				$screen                            // Post type
				);
	}
}
add_action( 'add_meta_boxes', 'wporg_add_custom_box' );

function wporg_custom_box_html( $post ) {
	 $args = array('quicktags' => false);
	 wp_editor(  'Welcome to WP'  , 'test-editor', $args );
}