Yahoo Mail "launchcascadeerror ymws server mailboxopenfailed" Questions

...log into my yahoo email account this message pops up. the error, launchcascadeerror-ymws.server,mailboxopenfailed,occurred when trying to connect to yahoo mail fix your browser or contact yahoo

...LaunchCascadeError-ymws:Server.MailboxOpenFailed, occurred when trying to connect to Yahoo! Mail. Any ideas? Please help- it's been about a week!!! I use yahoo mail all of the time, used it today. ...

LaunchCascadeError-ymws:Server.MailboxOpenFailed, occurred when trying to connect to Yahoo! Mail. first of all check if u can open it with a diff browser, if still the same then try n go to safe mode ...