Cant buy Gifts

Hey, i recently got the stats.fm plus subscription and now wanted to gift two subscriptions to my friends. But when clicking on the gift button on th /gifts page
I only get the error “something went wrong”

When further looking into the request i see an error code 400 with the message:

"Automatic tax calculation in Checkout requires a valid address on the Customer. Add a valid address to the Customer or set customer_update[address] to 'auto' to save the billing address entered in Checkout to the Customer."