at some point I had enabled the feature that will force cpanel users to change their passwords after 6 months.
Now I can not find where this feature is located, as I want to disable it - well at least temporarily.
Also, when I will restore back this feature, is it possible to apply it...
I don't have much knowledge about this, but i am going to share a url, may be this url will be helpful for you. http://forums.cpanel.net/threads/fyi-setting-password-age-causes-302-redirect-loop-at-cpanel-logins-if.229501/
If this is not helpful for you, then contact admin.
I have password expiration enforced after every 90 days and I got this message in cPanel's error_log after I changed my password:
[2015-03-06 09:18:52 +0800] warn [Fileman::statfiles] Encountered error in Fileman::statfiles: The file “Website.zip” is not available.