Unable to modify Product Categories inside a product - MethodNotAllowedHttpException

[nbarxma]

I'm reporting a Bug :
When navigating into the Category section of a product that has Categories already assigned, there will always be a loading icon and
as a result categories are unable to get modified for a product once set.

Error message:
No route found for "GET https://myakeneo.com/enrich/product/list-categories/product/030c4ecb-f03e-46d9-b7e6-0d86de77674f/parent/4910": Method Not Allowed (Allow: POST)
MethodNotAllowedHttpException

📎 I'm using the Community Edition 📎

[Username070]

I will assume that you are using Akeneo version 7.x.

Judging by the error message, it looks like the request method is incorrect. You application is sending GET method, while POST is defined in the configuration: https://github.com/akeneo/pim-community-dev/blob/7.0/src/Akeneo/Pim/Enrichment/Bundle/Resources/config/routing/ui/product.yml

This endpoint configuration specifically:

pim_enrich_product_listcategories:
    path: /list-categories/product/{uuid}/parent/{categoryId}
    defaults: { _controller: pim_enrich.controller.product:listCategoriesAction, _format: json }
    requirements:
        uuid: '[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}'
        categoryId: \d+
    methods: [POST]

Make sure that your configuration is correct, and you're not overriding it.