Hi Ally, thank you again for helping me with this.
I can confirm that the domain doesn’t change at all. Not even the folder changes, both PHP scripts are in the same folder.
I have sent the admin credentials through your feedback form.
Let me explain a bit where is that code:
I create a plugin to handle all this named “QuForm – Personalización” (at ‘form-desigualdad’ folder). The file that stores the session variable is “form-desigualdad.php” and the file that should get it is “form-desigualdad-API.php”. In this file, I have commented all the session code. You can uncomment it to make your tests.
Thank you very much!