Change

config/routes.rb

@@ -4,7 +4,7 @@ Rails.application.routes.draw do
   require 'admin_constraint'
 
   # mount Sidekiq::Web => '/sidekiq', :constraints => AdminConstraint.new
-  mount Sidekiq::Web => '/admins/sidekiq'
+  
   # Serve websocket cable requests in-process
   mount ActionCable.server => '/cable'
 
@@ -414,6 +414,7 @@ Rails.application.routes.draw do
   end
 
   namespace :admins do
+    mount Sidekiq::Web => '/sidekiq'
     get '/', to: 'dashboards#index'
     resources :project_statistics, only: [:index] do
       collection do