2d21e98e___Possible_Solutions
[Error Code] The permissions may be wrong on your private key file [Definition] If the permissions on your end user certificate private key file are too lax (for example, if others can read the file), grid-proxy-init will refuse to create a proxy certificate. [Possible Solutions] 
You can "fix" this by changing the permissions on the private key file. Important: However, you will still have a much more serious problem: it is possible that someone has made a copy of your private key file. Although this file is encrypted, it is possible that someone will be able to decrypt the private key, at which point they will be able to impersonate you as long as your end user certificate is valid. You should contact your CA to have your end-user certificate revoked and get a new one.
Possible Solutions