Typically when sellers report this it's because their account is opted in to business policies but they're trying to list with the quick listing tool which doesn't support business policies.
So you can either switch to Seller Hub and the unified (business) listing tool, or you can opt out of biz policies and keep using the quick lister.
There should be an error message at the top of the listing form that directs you Seller Hub and the unified lister.

Manage and edit biz policies, or disable them to go back to how you used to set up your listings on this page.
