Oh, the syncing preference is OneDrive. The location is Chinese in default. The error was disappeared when I change to English local path. Thank you for your reply!
System: Mac12.5
Alfred version: 5.0.1 [2067]
Hello, dear. When I click `-` and try to remove collections of Snippets, it returns as following error on the top. Actually, I can not remove any collection because of the same reason.