GRN2-192: Made error pages more descriptive (#620)

* GRN2-192

* Brought back error codes

config/locales/en.yml

@@ -119,7 +119,7 @@ en:
       message: Invalid BigBlueButton Endpoint and Secret
       title: Server Error
     internal:
-      message: Oh no! Looks like something went wrong on our end.
+      message: Looks like something went wrong on our end.
       help: The error has been logged, we'll take a look!
     migration_error:
       contact_admin: If you are not an administrator, please contact one.
@@ -138,17 +138,18 @@ en:
       confirmation: doesn't match %{attribute}
       inclusion: is not included in the list
     not_found:
-      message: Whoops! Looks like we can't find that.
+      message: Sorry! The page you are looking for does not exist.
       help: Is it possible its been removed?
-      user_message: User Not Found.
-      user_help: Sorry, this user is not registered.
+      user_not_found:
+        help: Please contact an administrator.
+        message: Sorry, this user is not registered.
+      user_missing:
+        help: Please verify the URL and try again
+        message: The URL that you have entered is not valid.
     title: Errors
     unauthorized:
       message: You do not have access to this application
       help: If you believe this is a mistake, please contact your system administrator.
-    unprocessable:
-      message: Oops! Request is unprocessable.
-      help: Unfortunately this isn't a valid request.
   expired_reset_token: Password reset link has expired!
   features:
     title: Features

config/routes.rb

@@ -22,7 +22,6 @@ Rails.application.routes.draw do
   # Error routes.
   match '/401', to: 'errors#unauthorized', via: :all, as: :unauthorized
   match '/404', to: 'errors#not_found', via: :all, as: :not_found
-  match '/422', to: 'errors#unprocessable', via: :all
   match '/500', to: 'errors#internal_error', via: :all, as: :internal_error
 
   # Signin/Signup routes.