Hi ErikTank,
Based on your description, I made the following analysis:
(1) First of all, we want to make sure that Hyper-V Manager is running as an administrator.
(2) Second, we look at Hyper-V related services in "Services" to see if there is a service "Hyper-V Virtual Machine Management", and if so, start the service and set the "Startup type" to "Automatic".
(3) If you do not have the service, you need to install the service manually, but because you have already configured the cluster, this situation may not exist.
(4) We also need to ensure that a dedicated network interface is created for the virtual switch to ensure the reliability of the network.
(5) For the memory error you said, I think the following link may help you:
manage-host-fails-error-2911
Note: The second link has some similar errors to your issue:
an-error-occurred-while-attempting-to-connect-to-server-quotltservernamegtquot-check-that
Hope my answer helps you!
Best Regards,
Xu GU