Moved Root directory -> Page Builder loads no more

Hi Guys,

as a hudge fan of the page builder I am facing a problem here.

I was changing my wordpress from “mysite.org/wordpress” to “mysite.org” using this manual: https://codex.wordpress.org/Giving_WordPress_Its_Own_Directory

Works so far, i can load pages created by page builder. But now I cannot open page builder for futher editing any more. It tries to load for a second and then just displays my site. AFter searching the internet for hours I decided to ask for help.

I have changed the website URL under general settings to the URL without /wordpress/ and edited htaccess and index.php in the root folder.

<FilesMatch .php$>
SetHandler x-httpd-php5.6
</FilesMatch>

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

<?php
/**
 * Front to the WordPress application. This file doesn't do anything, but loads
 * wp-blog-header.php which does and tells WordPress to load the theme.
 *
 * @package WordPress
 */

/**
 * Tells WordPress to load the WordPress theme and output it.
 *
 * @var bool
 */
define('WP_USE_THEMES', true);

/** Loads the WordPress Environment and Template */
require( dirname( __FILE__ ) .'/wordpress/wp-blog-header.php' );

I appreciate any help.
Kind regards from Germany
Wilo