Hey,
You can try disabling firewall on your nodes and try again. There is a list of ports, which are required to be open for Failover Cluster. Might help: https://learn.microsoft.com/en-us/answers/questions/495610/windows-server-2019-failover-cluster-manager-how-t
In addition, you can check the remote management is enabled. https://learn.microsoft.com/en-us/windows-server/administration/server-manager/configure-remote-management-in-server-manager
The following guide might also help with configuration: https://www.starwindsoftware.com/resource-library/starwind-virtual-san-for-hyper-v-2-node-hyperconverged-scenario-with-windows-server-2016/
Cheers,
Alex Bykovskyi
StarWind Software
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