I have installed your plugin and cannot access the Category page and Order page on backend. I am getting this error for Category:

Symfony\Component\Yaml\Exception\ParseException: The reserved indicator "@" cannot start a plain scalar; you need to quote the scalar at line 9 (near "form: @/plugins/afw/plans/models/category/fields.yaml"). in /nfsmnt/hosting1_2/4/d/4d4f3524-ef9a-46b5-8472-5419f2fcd2af/collectionsites.eu/web/vendor/symfony/yaml/Inline.php:350

And this error for Order:

Symfony\Component\Yaml\Exception\ParseException: The reserved indicator "@" cannot start a plain scalar; you need to quote the scalar at line 9 (near "form: @/plugins/afw/plans/models/order/fields.yaml"). in /nfsmnt/hosting1_2/4/d/4d4f3524-ef9a-46b5-8472-5419f2fcd2af/collectionsites.eu/web/vendor/symfony/yaml/Inline.php:350

Any help would be appreciated.

Bitte im Plans/Controllers/Categories/config_list.yaml

lists: @ / plugins / afw / plans / models / category / fields.yaml

auf das ändern

list: $/afw/plans/models/category/columns.yaml