Hyper-V failed to open attachment

I am running a failover cluster Hyper-V HCI with a CSV on S2D.  Some of my VMs have an iso mounted.  The ISO is on the CSV at `c:\ClusterStorage\Volume 02\software\iso\xxx.iso`.

My Event Viewer has many log entries that report:

Event ID 27000, Hyper-V-VMMS

Failed to open attachment 'c:\ClusterStorage\Volume 02\software\iso\xxx.iso'.  Error: 'One or more arguments are invalid'.

Why am I getting this message?  How do I "dig deeper" into the logs to figure out who/what/why I am getting this error?  Which "arguments" are invalid?

Chris