diff --git a/app/models/user.rb b/app/models/user.rb
index 60e9df1..f113f3b 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -19,7 +19,8 @@ class User < ApplicationRecord
 
   validates :email, presence: true, uniqueness: true,
     length: {maximum: type_for_attribute(:email).limit}
-  validates :unconfirmed_email, length: {maximum: type_for_attribute(:unconfirmed_email).limit}
+  validates :unconfirmed_email,
+    length: {maximum: type_for_attribute(:unconfirmed_email).limit}
 
   def to_s
     email
diff --git a/config/routes.rb b/config/routes.rb
index b40d356..6218a39 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -20,8 +20,14 @@ Rails.application.routes.draw do
     end
   end
 
-  devise_for :users, path: '', path_names: {registration: 'profile'},
-    controllers: {registrations: :registrations}
+  # Devise does not handle properly models that require database access during loading.
+  # https://github.com/heartcombo/devise/issues/5786
+  connection = ActiveRecord::Base.connection
+  if connection.schema_version && connection.table_exists?(:users)
+    devise_for :users, path: '', path_names: {registration: 'profile'},
+      controllers: {registrations: :registrations}
+  end
+
   resources :users, only: [:index, :show, :update] do
     member { get :disguise }
     collection { get :revert }