Unable to Create a Scale Out File Server on Server 2012 R2

One Failover cluster I have with two nodes and 3 Enclosures have a ambiguous problem when trying to create a SOFS role.

We do have multiple Clusters with very similar structure/configuration but this one is the only one with the error so far:

Here's the Error:

PS C:\Windows\system32> Add-ClusterScaleOutFileServerRole -Name HA-SOFS -Cluster HA-Cluster
Add-ClusterScaleOutFileServerRole : An error occurred while performing the operation.
    Value cannot be null.
Parameter name: node
At line:1 char:1+ Add-ClusterScaleOutFileServerRole -Name HA-SOFS -Cluster HA-Cluster+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+ CategoryInfo          : InvalidArgument: (:) [Add-    ClusterScaleOutFileServerRole], ClusterCmdletException+ FullyQualifiedErrorId : ArgumentNull,Microsoft.FailoverClusters.PowerShell.AddClusterScaleOutFileServerRoleCommand

I get the same error when doing it on the GUI:

Value cannot be null. Parameter name: node

What do you think this means? Any suggestions?