This error occurs when the file in the editor is marked as read-only.

当编辑器中的文件被标记为只读时出现此错误。

youdao

Reply right away, marked as read, or delete, total control of your preview.

马上答复，标记为只读，或删除，完全控制你的预览。

youdao

Unable to delete folder. The folder or parent folder may be marked as read-only.

无法删除文件夹，该文件夹或父文件夹可能被标记为只读。

youdao

Once an email message is read on Cloze, it can be automatically marked as read in one's real inbox, but Twitter and Facebook posts were often replicated in both places.

WSJ: Review of Cloze: An Email Inbox That Knows Who's Important