Errors with schema and installed settings file

I am receiving the following issue when attempting to run a browser test installing the configuration of the r4032login module.

Schema errors for r4032login.settings with the following errors: r4032login.settings:access_denied_message_type variable type is string but applied schema class is Drupal\Core\Config\Schema\Mapping, r4032login.settings:default_redirect_code variable type is string but applied schema class is Drupal\Core\Config\Schema\Mapping, r4032login.settings:_core missing schema, r4032login.settings:langcode missing schema
 /....../web/core/lib/Drupal/Core/Config/Testing/ConfigSchemaChecker.php:93
 /....../web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php:111
  /....../web/core/lib/Drupal/Core/Config/Config.php:227
  /....../web/core/lib/Drupal/Core/Config/ConfigInstaller.php:325

The issue seems to be caused by the settings schema. I spotted three issues there:

• The access_denied_message_type property is defined as
  

  access_denied_message_type:
        type: mapping
        label: "User login 'access denied' message type"
        mapping:
          error:
            type: string
            label: 'Error'
          warning:
            type: string
            label: 'Warning'
          status:
            type: string
            label: 'Status'
  

  and in the r4032.settings.yml file it is defined as

  access_denied_message_type: 'error'
  

  while, if we follow the mapping above, it would be

  access_denied_message_type: 
      error:error
  

  The type should change to string. The value is assured by the options field in the admin settings form. Further validation can be set but I do not think this is that necessary.

• The access_denied_message_type property is defined as

  default_redirect_code:
        type: mapping
        label: 'HTTP redirect code'
        mapping:
          302:
            type: integer
            label: '302 Found'
          301:
            type: integer
            label: '301 Moved Permanently'
  

  and in the r4032.settings.yml file it is defined as

  default_redirect_code: '302'
  

  while, if we follow the mapping above, it would be

  default_redirect_code: 
      302: 302
  

• The r4032login schema itself is defined as

  r4032login.settings:
    type: mapping
    label: 'Redirect 403 to User Login (r4032login) settings'
  

  This is because it is expecting a config_hash.
  The settings should be defined as type 'config_object'.

Proposed solution

• The access_denied_message_type type should change to string. The value is assured by the options field in the admin settings form. Further validation can be set but I do not think this is that necessary.
• The default_redirect_code should change to integer. The value is assured by the options field in the admin settings form. Further validation can be set but I do not think this is that necessary.
  A caution here: I do not know if that will cause any issues on updates since the value in r4032login.settings.yml was '302' which is a string but should be 302 which is an integer.
• Change the settings schema to be of type 'config_object' as it normally should be.