Can’t filter and insert General Catelogy to Navigation Sidebar
How can we insert this category in sidebar Categories Navigation ?
Shouldn’t your category name and slug be written in Vietnamese? Are you talking about the Uncategorized category?
Hey, it works fine on my forum. Maybe it’s just a small mistake on your side. Can you let me know what the dialogue box is saying, or if you can send a screenshot of the whole box? Also, I guess it might be due to the language.
Instead try Unclassified, and it might work.
Are you able to search and add other categories?
Can you try changing the name from Uncategorized to General and then it may work, you always change the name after pinning.
메타에서도 사이드바에 "미분류"를 추가할 수 없습니다.
의도된 것인지, 아니면 단순한 누락인지 모르겠습니다(미분류가 실제로 카테고리에 해당할까요? 
).
Contribute > Feature #sidebar에서 사이드바에 "미분류"를 추가할 수 있도록 하는 것을 제안해 보시는 건 어떨까요?
우리가 같은 것을 이야기하고 있는지 확인하기 위해 묻습니다. 디스커스 설치 시 기본적으로 존재하는 “일반” 카테고리가 아니라 "미분류"에 대해 이야기하고 있는 것이 맞죠?
That’s Exactly the Uncategorized Category.
Do you have ‘allow uncategorized topics’ enabled? It is not enabled on Meta.
I’ve enabled uncategorized topics on my forum but can’t add it in the sidebar 
I can add Uncategorized through the default navigation menu categories site setting but I can’t add or remove it directly from the sidebar, even as an admin.
However, I can add and remove it as a user by doing a manual PUT request to /u/myusername.json with sidebar_category_ids[]: 1 in the payload.