Target/forward paramater = Internal Error 500

Hello,

I’m having troubles embedding the wp-admin page.
The extracted data does show in the frontend.
But as soon I click on any button I’m getting an “Internal Error 500”.
So no form submition possible at the moment.

[advanced_iframe securitykey=”YOUR_KEY” include_url=”/wp-admin/post-new.php” url_forward_parameter=”ALL” change_iframe_links_target=”_self”]

Any clue why url_forward_parameter=”ALL” does not work?
Is there any work around available to get form submit working?

Many thanks.
Best,
Chris

https://wordpress.org/plugins/advanced-iframe/