Hello. Thank you for contacting the Toolset support.
First of all, Toolset blocks do not support nested views yet but with Toolset blocks, you can create and use the classic views using which you can create nested views.
It's still not clear how exactly you want to filter your view. As I understand, you want to filter the view using another view's URL param. I would be able to guide you in the right direction once I can see your structure and how exactly you are going to pass the URL param from where and to which view.
Can you please share the problem URL and share your exact requirements on how exactly you are going to pass the URL param and I will review the requirement.
*** Please make a FULL BACKUP of your database and website.***
I would also eventually need to request temporary access (WP-Admin and FTP) to your site. Preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
I have set the next reply to private which means only you and I have access to it.
