Prepare to support ruby 3.3.

app/controllers/admin/box_controller.rb

@@ -9,7 +9,7 @@ class Admin::BoxController < ApplicationController
 
   def index
     is_not_open = `fuser #{SocketFile}`.gsub(/\n/, '').empty?
-    if !File.exists?(SocketFile) || `ss -elx | grep -w "$(stat -c 'ino:%i dev:0/%d' '#{SocketFile}')"`.blank?
+    if !File.exist?(SocketFile) || `ss -elx | grep -w "$(stat -c 'ino:%i dev:0/%d' '#{SocketFile}')"`.blank?
       Thread.new do
         `#{Binary} --unixdomain-only #{SocketFile}:$USER:$USER:0666 --disable-ssl --debug  --css #{CSSFile}`
       end

lib/client_management/engine.rb

@@ -1,6 +1,7 @@
 module ClientManagement
   class Engine < ::Rails::Engine
     initializer "client_management" do
+      Rails.application.config.to_prepare do
         OrbitApp.registration "client_management", :type => "ModuleApp" do
           module_label "client_management.client_management"
           base_url File.expand_path File.dirname(__FILE__)
@@ -9,8 +10,8 @@ module ClientManagement
           taggable "SiteServer"
           # frontend_enabled
           # data_count 1..30
-        require File.expand_path('../../../app/models/server_ability', __FILE__)
-        require File.expand_path('../../../app/models/plow_setting', __FILE__)
+          require File.join(ClientManagement::Engine.root, 'app/models/server_ability')
+          require File.join(ClientManagement::Engine.root, 'app/models/plow_setting')
           if ServerAbility.count==0
             ServerAbility.create()
           end
@@ -79,4 +80,5 @@ module ClientManagement
         end
       end
     end
+  end
 end