I have upgrade successful to 25.04. All Apps startet, but I lost my existing VM. Nice 
but no big issue, as it was not in use. Then I tried to define basic configure of the Intus Virtualization, but this fails, due a pihole running as App. I replace the App pihole with a physical pinhole so I could finalize the VM configuration. The I tried to define my first VM. When I started the new VM the server crashes, and does this each time I manual restarted it. I need to go back to the previous configuration 24.xx. Tried to upgrade, this was possible. The system comes back. But as soon as I startet the VM Network configuration, the server crashes again. It startes after the crash, continues until the Menu ist displayed and crashes immediately again. How am I able to upgrade to 25.04. but also to get rid of the damaging VM configuration. I do need a stable and reliable system again, which I had since years.
Actual active OS Version:TrueNAS-SCALE-24.10.2.1
Board Intel S1200SP
CPU:Intel(R) Xeon(R) CPU E3-1245 v6 @ 3.70GHz
Memory: 64 GiB
4x6TB Storage