wp-load.php not found

Hi guys.

So, I have this different structure for wordpress, basically my wordpress instalattion is managed by composer and that means that I have wp core files folder apart from the rest like wp-content.
Every other plugin works just fine with it except for Formstack, the reason is that in wysiwyg when I try to click the formstack button to choose the form I get the message wp-load.php not found.
This is due to you guys being loading/trying to find the file only in legacy or classic_root places…
To overcame this you have the global defined WP_LOAD_PATH but this actually don’t work because your’e loading the php.file using the javascrip windowManager.open that can’t see the global defined values.

I may be missing something here but how can I load my path without touching your files or the structure of my site?

thank you!