Hi @haoqi_shi welcome to the community. Just from taking a look at your screenshot, do you have any content that is not in a folder? If you temporarily move an article outside of the folder, does it show up?
Does this happen to all of your users, and have you tried a different browser by any chance? I took a quick look on Atlassian's Jira Site and didn't find any similar issues.
I'm wondering if you have everything in folders, that's it's not working as expected. If that is the case, and articles show up if they're not in folders, I would suggest contacting Atlassian Support and get their input.
Hope that helps.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.