developer domain

Since some days the "open in browser" and the "website preview" do not function with the plesk-developer-domain and its subdomains. I get a strange Url in preview like : https://tp545224.nice-toring.85-217-33-22.plesk.page.85-217-33-20.85.214.33.22.plesk.page/ . The "open in browser" hangs. I...