Attempt to open Plesk interface or update a license key on the virtual server results an error:
Error: The license key is invalid. In order to use Plesk, you need to obtain and install a new valid license key. The license key is intended only for use with Plesk operating inside the following virtual environments: Virtuozzo containers, VMWare, Microsoft Hyper-V, Xen, KVM, Virtuozzo Server, LXC, Docker.
BIOS data is
# dd if=/dev/mem bs=64K count=1 skip=12|head -n 3|cut -b 6- 1+0 records in 1+0 records out 65536 bytes (66 kB) copied, 0.00020045 s, 327 MB/s IBMPlex86/Bochs VGABios (PCI) current-cvs 02 Dec 2010 2008 the LGPL VGABios developers Team s VGA/VBE Bios is released under the GNU LGPL
Such behavior is known as software issue with id #PPPM-3575. The issue has been fixed in Plesk 12.5 MU#21.
Apply latest Plesk microupdates.