1. Clear Quark browser cache: Open Quark browser, click My > Settings > Privacy and Security > Clear Browsing Data, check "Cache" and confirm clearing.
2. Log in to the account again and synchronize: open Quark browser, click "My" > "Login" in turn, and enter the account password to log in again. After logging in successfully, you can go to My > Cloud Synchronization in Synchronization Options, check Bookmark and conduct a Manual Synchronization.
3. Delete bookmarks manually: If the above two methods can't solve the problem, you can also delete unnecessary bookmarks manually. In Quark browser, long press the bookmark icon to be deleted and select Delete.