Add private user admin fixes

app/commands/concerns/decidim/privacy/admin/create_participatory_space_private_user_extensions.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module Decidim
+  module Privacy
+    module Admin
+      module CreateParticipatorySpacePrivateUserExtensions
+        extend ActiveSupport::Concern
+
+        included do
+          private
+
+          def existing_user
+            return @existing_user if defined?(@existing_user)
+
+            @existing_user = Decidim::User.entire_collection.find_by(
+              email: form.email.downcase,
+              organization: private_user_to.organization
+            )
+
+            InviteUserAgain.call(@existing_user, invitation_instructions) if @existing_user&.invitation_pending?
+            @existing_user
+          end
+        end
+      end
+    end
+  end
+end

lib/decidim/privacy/engine.rb

@@ -113,6 +113,9 @@ class Engine < ::Rails::Engine
           # The following changes are related to "Ask old password for changing email/password(PR #11737)"
           # These changes should be removed once it has been backported to v.27
           Decidim::UpdateAccount.include(Decidim::Privacy::UpdateAccountExtensions)
+          Decidim::Admin::CreateParticipatorySpacePrivateUser.include(
+            Decidim::Privacy::Admin::CreateParticipatorySpacePrivateUserExtensions
+          )
 
           # controllers
           Decidim::ApplicationController.include(