@Frida5:
Like you, I also see "This listing is no longer available."
it sounds like you've already done this, but let's start trouble shooting with the basics. Go into your admin panel, navigate to your calendar and then click the three little lines that are located far left in the charcoal menu to make the side menu appear. Scroll to the very bottom of the menu and make sure that your home is listed and not snoozed or unlisted.
Next check your availability settings (charcoal colored menu) and see if those settings are not conflicting.
If neither one of those ideas do the trick then think about contacting Airbnb.