Works, i fixed it setting the open_basedir to C:\Inetpub\vhosts\<hostname>\<clientsite>\;c:\windows\temp\
I think that is not the best solution. yes, it's might be a security issue.
OS Microsoft Windows 6.1;build-7601;sp1.0;suite1296;product3
Panel version 10.4.4 Update #57, last updated at...