Unable to save any action

Hi,
I have just tested your plugin on a marketplace Woocommerce website but the selected options in products categories never get saved.

Lets say I have an additional role called Vendor and I want to restrict some categories for this role. I check 2 or 3 categories but when I hit save changes the browser refreshes with a successful message but no changes are really saved. The users with Vendor role can still assign all categories to their products.
I want to restrict each user to use their own taxonomies automatically only.
Have you tested it with Woocommerce? or is there something I am missing.

Thanks in advance!!