Config schema is incorrect

I have this error when updating Drupal core:

>  [notice] Update started: system_post_update_add_langcode_to_all_translatable_config
>  [notice] Processed 50 items of 1278.
>  [notice] Processed 100 items of 1278.
>  [notice] Processed 150 items of 1278.
>  [notice] Processed 200 items of 1278.
>  [notice] Processed 250 items of 1278.
>  [notice] Processed 300 items of 1278.
>  [notice] Processed 350 items of 1278.
>  [notice] Processed 400 items of 1278.
>  [notice] Processed 450 items of 1278.
>  [notice] Processed 500 items of 1278.
>  [notice] Processed 550 items of 1278.
>  [notice] Processed 600 items of 1278.
>  [notice] Processed 650 items of 1278.
>  [notice] Processed 700 items of 1278.
>  [notice] Processed 750 items of 1278.
>  [error]  AssertionError: assert($typed_config instanceof Mapping) in assert() (line 264 of /var/www/html/docroot/core/modules/system/system.post_update.php) #0 /var/www/html/docroot/core/modules/system/system.post_update.php(264): assert(false, 'assert($typed_c...')

I updated the schema + implemented hook_update_N