VMs Booting from hard disk after memory installation

[zerliob]

Hello,
I changed the memory sticks on my Proxmox machine 7.4.19 (old HP Z230 Xeon processor) from 4x4 GB to 4x8 GB non ECC UDIMM.
On reboot, PVE shows 32 GB instead of 16 GB, so far so good.
I have 4 VMs: 2 Win11, one Win 10 and one debian.
While everything was working perfectly, they are no longer working and are stuck on Booting from hard disk...
I've created a new windows 10 VM and tried to install it from a win10 iso image, but the VM freezes during installation.
What should I do?
Thanks in advance

Translated with DeepL.com (free version)

 

[zerliob]

The start of a possible answer,
It seems that the memory sticks need to be ECC UDIMM for 32 GB with a Xeon processor...
What do you think?

 

[zerliob]

https://www.kingston.com/en/memory/search/model/85694/hp-hpe-workstation-z230-tower-sff