When a guest tries to book one specific property, they see an "internal error" or 500 error. All other properties on the same site quote and book normally.
Why this happens. The property on your website has a broken connection to its corresponding listing in your property management system. When that link is misconfigured for a single property, the booking system cannot retrieve pricing, and guests attempting to book that listing get an error. Your other properties are unaffected because their connections are intact.
What you can do. Contact support. Support can identify and correct the broken mapping, which resolves the error immediately without any change to the rest of your site.