Failed to Backup Virtual Machine under Hyper Cluster Infrastructure

Hi,

I'm trying to backup a virtual machine which has been identified in the "Virtual Machine" tab. But when the process is running i have the error below :

-------------------
Error Code : 3
Module: 83
LineInfo 7a8e71d4f05a3933
Fields: $module: hv_srv_vs_38573
Message: Failed to obtain associated virtual system settings
-------------------

For information, the current license which is used for my host is an "Acronis Backup advanced 11.5", I thought it's may be coming from the license, but the message doesn't look it related to that.

So even so, I ve tried to apply a Trial license that I received from your website including HyperV License, But the license is not able to load in to it :

it said : "Cannot retrive information from the license; Make sure that the license is correct and try again"...

Any ideas ?

Thanks for your help.
Regards,
Cyril