Some options Plesk link to blank pages

[Wasper]

Some options are blank my Plesk. For example, I can create new FTP accounts, I can not create alias domains, or backups, as are blank.

Deputy images with some options to click send me a blank screen.

This occurs in any subscription, which makes me think that may be a global problem.

Until a few weeks ago worked properly.

What can it be?
Any solution?

thanks

 

[IgorG]

http://kb.parallels.com/en/113637
http://kb.parallels.com/en/9341
http://kb.parallels.com/en/9267