When we try to edit a content-submission-form, we only get "Oberer Balken" (upper bar?), Einstellungen (settings), and the rest of the page remains empty.
Can you provide me with an example link to the page where you're having issue with the form ?
What I mean is that a URL to the page where I can click to the edit form. I'm assuming that you're trying to edit your post on the frontend so there should be an edit link on the page to that form.
In a case like this when the plugins are not functioning as intended we recommended that you disable the non-toolset plugins.
What this means is that you will need to go through your list of plugins and disable each of your plugins one at a time while checking to see if the issue still remains.
Once you've done this and the issue still remains please let me know.
Thanks,
Shane
I've enabled the wordpress debugging on your website using the WP Debugging plugin and saw this error on your edit page for the form.
Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 4194312 bytes) in /var/www/lern.land/wp-includes/class-wp-term-query.php on line 1063
Based on this error your wordpress install is running out of memory to render the page. What I recommend that you do is to increase your wordpress allocated memory. To do this I recommend that you follow the instructions below.
First you need to edit the wp-config.php file on your WordPress site. It is located in your WordPress site’s root folder, and you will need to use an FTP client or file manager in your web hosting control panel.
Next, you need to paste this code in wp-config.php file just before the line that says ‘That’s all, stop editing! Happy blogging.’
define( 'WP_MEMORY_LIMIT', '256M' );
This code tells WordPress to increase the PHP memory limit to 256MB.
Once you are done, you need to save your changes and upload your wp-config.php file back to your server.
You can now visit your WordPress site and memory exhausted error should disappear now.
If the issue still remains please increase it to 512M if possible.