[Solved] Yahoo email : Cycle Prohibited error yahoo mail ,Cycle Probhibited error, Description: Could not process your request in firefox,In firefox,Yahoo Error 999 Unable to process request at this time

Problem:

How to solve, Yahoo email : Cycle Prohibited error yahoo mail ,Cycle Prohibited error, 
Description: Could not process your request

or
Yahoo Error 999 Unable to process request at this time 

Solution 1: Any Browser

Use below link to login to yahoo email fast and quicker

http://mlogin.yahoo.com/
us.wap.yahoo.com/p/mail

us.wap.yahoo.com/p/mail   ----- this is very fast loading yahoo email mobile site .

Solution 2:  In firefox.

Use CCleaner to clear firefox browsing history,cookies and cached files.

Solution 3:

 Mostly this error comes in firefox browser.

Clear cookies in firefox : Firefox --> tools --> options ->privacy -> remove cookies

Clear cached files in firefox : Firefox  -->tools ->options -> Advanced -> Network -> clear now.