Unavailable item error but item is available.

[sophsterm]

I add this product to my cart. I try to pay and I get this error. anyone know what it means? I’ve tried on various computers and browsers. The item is available and the seller says it should work fine. But it doesn’t. Ideas?

Unfortunately, this item is currently unavailable from this seller. We apologize for any inconvenience and recommend that you search for similar items from other sellers.{e72134-1078503x}