Undefined array key "type" when a new imagekit container is created / statamic 3

[a-rsc]

I can upload a file with the endpoint but it appaers an error when a new imagekit container is created. The error says "Undefined array key "type|"". I can't find the solution.
The laravel.log says:
[2021-12-20 11:33:12] local.ERROR: Undefined array key "type" {"userId":1,"exception":"[object] (ErrorException(code: 0): Undefined array key "type" at /var/www/html/vendor/statamic/cms/src/Stache/Stores/ContainerAssetsStore.php:83)
[stacktrace]