Cannot boot pxe sysresccd

Hello

We are currently working on integrating the SystemRescueCD as a PXE environment. We were able to successfully boot from it on hardware servers. But it doesn't work with virtual servers. It gets stuck with the following error: [1.269099] ACPI Error: AE_NOT_FOUND, Evaluating _CRS (20180810/pci_link-274) :: Mounting ´/dev/disk/by-label/´ to ´/run/archiso/bootmnt´ Waiting 30 seconds for device /dev/disk/by-label … ERROR: ´/dev/disk/by-label/´ device did not show up after 30 seconds… Falling back to interactive prompt You can try fix the problem manually, log out when you are finished Sh: can´t access tty; job control turned off

In there I can see, there is no disk in the "/dev/diks/by-label" folder. But there are by-id, by-partuuid, by-path and by-uuid. In those folders are all the drives listed.

Can you help me, with this issues?