All my folders, including inbox, are now empty!
This happened immediately after the update. All my folders are showing as "empty" and I can't even receive new emails I send myself!
Not getting the emails you expect is frustrating, especially when you are waiting for an important email. Use the steps below to quickly identify the reason behind this and if there’s an issue with your account or the sender’s account that’s preventing the messages from arriving: https://help.yahoo.com/kb/emails-received-yahoo-mail-sln28074.html
Also, please try clearing your cache and cookies or go to another browser to see if you encounter the same issue.
Hope this helps!