handle blank permalink in post.url

app/models/communication/website/post.rb

@@ -137,6 +137,7 @@ class Communication::Website::Post < ApplicationRecord
     return unless published
     return if website.url.blank?
     return if website.special_page(:communication_posts)&.path.blank?
+    return if current_permalink_in_website(website).blank?
     Static.clean_path "#{website.url}#{current_permalink_in_website(website).path}"
   end