“We are not accepting applications to sell:” Error

Hey guys, I am trying to sell my own branded product on Amazon. I created the listing, and it was fine for over a month. But when I try to edit the listing or send inventory, I get the following message:

“You need approval to list this ASIN.”

And when I click “Request Aproval,” I get the following:

“We are not accepting applications to sell:

Other Health & Personal Care category in Refurbished, Collectible condition(s) Other Health & Personal Care category in Used condition(s) Other product(s)”

I have contacted seller support several times and they always give a different answer. The most coherent one was that I am gated from selling my own brand because I am not brand registered.

Has anyone experienced this? This product is new conditions, on a category that doesn’t require approval (according to amazon), my account is brand new and in healthy conditions, and I am the brand owner just not brand registered.

Can anyone help here?