Subscription management:

Drag&Drop:
between categories (green marked): no problem
inside of a category (red): 404 error (cannot reorder)

To Reproduce
Steps to reproduce the behavior:

1. Go to subscription management
2. reorder a feed via drag and drop

Expected behavior
can reorder the feed inside of a category

Environment information (please complete the following information):

• FreshRSS version: [e.g. 1.18.1]