Click the edit button on the category page to go to page 404

Thank you!

I didn’t like long slugs and had turned it off before.
Selecting’encode’ for the slug generation method resolved the 404 error.
In such a situation, I think that it could be prevented by not accepting multi-byte characters or if there was a cautionary note.

In any case, it’s strange that the encoded string was assigned to the category that was emptying the slug …