Hi,
We are only other sellers here,
did you put your 2 digit country code in front of the number?
you don't have your VAT ID number in etsy either, you need to put it here
https://help.etsy.com/hc/en-gb/articles/360040975813?segment=selling
I also have the same issue. I enter my correct vat number (DE...) and it does not work.