The PowerCLI Command New-VM delivers with vcsim the error: The valid range for VM memory size is between 4 MB and 0 MB

[StSchnell]

I installed the current version from vcsim, PowerShell and PowerCLI. I start vcsim with username, password and tls=false arguments. The connection with the PowerCLI to the simulated vCenter works fine. The cmdlets Get-Datacenter, Get-VM, Get-VMHost and Get-Datastore delivers all the expected results. Everything looks very good, but when I try to create a VM with the New-VM cmdlet an error message occurs.
E.g. the code ...

$cluster = Get-Cluster -Name DC0_C0
New-VM -Name vm-test -ResourcePool $cluster

... delivers New-VM: 1/22/2024 10:47:12 AM New-VM The valid range for VM memory size is between 4 MB and 0 MB.
Also I tried it with -MemoryGB and other different variants, but I get always the same result.
What is my mistake? Does anyone have a tip or an idea?
Thanks and best regards
Stefan