There is no authorization in activeadmin. How to understand what the problem is?

I am trying to get involved in one project and an incomprehensible situation has arisen; I cannot log into the activeadmin panel on my local server, while everything was fine a week ago. My colleague has no problems, tried to install Ruby, rails with gems on a new clean system (mint, mac os in a virtual machine), was played with versions - without result. I expect help in the algorithm, how to find the problem. Used gems: activeadmin (1.0.0.pre1), devise, cancan

=> Booting WEBrick => Rails 4.2.0 application starting in development on http://localhost:3000 => Run `rails server -h` for more startup options => Ctrl-C to shutdown server [2016-03-07 13:07:37] INFO WEBrick 1.3.1 [2016-03-07 13:07:37] INFO ruby 2.3.0 (2015-12-25) [x86_64-darwin15] [2016-03-07 13:07:37] INFO WEBrick::HTTPServer#start: pid=574 port=3000 Started GET "/admin/login" for 127.0.0.1 at 2016-03-07 13:07:39 +0300 ActiveRecord::SchemaMigration Load (53.1ms) SELECT "schema_migrations".* FROM "schema_migrations" Processing by ActiveAdmin::Devise::SessionsController#new as HTML Parameters: {"subdomain"=>"cp"} Rendered /Users/admin/.rvm/gems/ruby-2.3.0@gemset1/bundler/gems/activeadmin-7c18de4cbcf5/app/views/active_admin/devise/shared/_links.erb (18.0ms) Rendered /Users/admin/.rvm/gems/ruby-2.3.0@gemset1/bundler/gems/activeadmin-7c18de4cbcf5/app/views/active_admin/devise/sessions/new.html.erb within layouts/active_admin_logged_out (149.4ms) Completed 200 OK in 944ms (Views: 784.9ms | ActiveRecord: 73.6ms) Started GET "/assets/active_admin/print-dc80313545ee56b4f0861d100d53df16e909c58545c2ae17db7a965cb22d62f0.css" for 127.0.0.1 at 2016-03-07 13:07:41 +0300 Started GET "/assets/active_admin-58d7bbc13e24a649c19c695f83c6ff4c31560bea2b32245b2e04d4d41cdf092d.css" for 127.0.0.1 at 2016-03-07 13:07:41 +0300 Started GET "/assets/active_admin-01877a5096ea1fdc96a6ab5849f381bd5e0e7af0b4eb2271c8a865efdb73a112.js" for 127.0.0.1 at 2016-03-07 13:07:41 +0300 Started POST "/admin/login" for 127.0.0.1 at 2016-03-07 13:07:52 +0300 Processing by ActiveAdmin::Devise::SessionsController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"dSGy7bQT1CW8U5wnEXF5VEufVkwWsLrh3dYYtuPnI0gdattt3Vg7IFKKFkyd/fhqqdCL0HNHBqYs0p0gM3rQGA==", "user"=>{"email"=>"admin@example.com", "password"=>"[FILTERED]", "remember_me"=>"0"}, "commit"=>"Войти", "subdomain"=>"cp"} User Load (45.0ms) SELECT "users".* FROM "users" WHERE "users"."email" = $1 ORDER BY "users"."id" ASC LIMIT 1 [["email", "admin@example.com"]] (0.4ms) BEGIN SQL (15.7ms) UPDATE "users" SET "last_sign_in_at" = $1, "current_sign_in_at" = $2, "sign_in_count" = $3, "updated_at" = $4 WHERE "users"."id" = $5 [["last_sign_in_at", "2016-03-07 02:48:42.110058"], ["current_sign_in_at", "2016-03-07 13:07:53.024530"], ["sign_in_count", 12], ["updated_at", "2016-03-07 13:07:53.027631"], ["id", 1]] (0.9ms) COMMIT Redirected to http://cp.test.ru:3000/admin Completed 302 Found in 343ms (ActiveRecord: 62.4ms) Started GET "/admin" for 127.0.0.1 at 2016-03-07 13:07:53 +0300 Processing by Admin::DashboardController#index as HTML Parameters: {"subdomain"=>"cp"} Completed 401 Unauthorized in 3ms Started GET "/admin/login" for 127.0.0.1 at 2016-03-07 13:07:53 +0300 Processing by ActiveAdmin::Devise::SessionsController#new as HTML Parameters: {"subdomain"=>"cp"} Rendered /Users/admin/.rvm/gems/ruby-2.3.0@gemset1/bundler/gems/activeadmin-7c18de4cbcf5/app/views/active_admin/devise/shared/_links.erb (10.3ms) Rendered /Users/admin/.rvm/gems/ruby-2.3.0@gemset1/bundler/gems/activeadmin-7c18de4cbcf5/app/views/active_admin/devise/sessions/new.html.erb within layouts/active_admin_logged_out (81.5ms) Completed 200 OK in 192ms (Views: 189.1ms | ActiveRecord: 0.0ms)