@Mai77 Default means that is your primary payout preference. It doesn't mean there's something wrong.
Did you just set up your listing? If so, pay no attention to that"no longer available" for the moment. Airbnb generates some pretty strange and confusing messages to hosts when they first set up their listing.
Give it a day, and if you still see that, contact Airbnb to find out what's going on . We're just a bunch of hosts here- we have no way to check what might be going on with your account.