That solution helps but is unsafe and increase the process in your server.
This may have another solution more secure and permanent but just setting Open_basedir = \ may fix this issues.
BUT AGAIN!
PARALLELS SHALL AMDE A KB ABOUT THIS ISSUE, HOW IS POSSIBLE NO OFFICIAL NOTICE OR KB ABOUT THIS ISSUE AND HOW TO FIX CORRECTLY.
NO EVERYONE IS A MASTER IN PHP OR SERVER ADMINISTRATION, THE IDEA TO HAVE A CONTROL PANEL IS MADE THINGS EASY NO HARDER.
Igor and Pavel in my point of view you guys are so irresponsible and shows the company policies at don't even shows up in this thread to at least give us options or answer any of the questions.
Things like this made people think switch!
I soon new panels will come and our loyalty would be compromised and I can tell I am talking for most of user and people use The Panel for windows.