Hi all. 
We have OS Newton and I wonder if it's possible to perform instance snapshot either on WUI or CLI. 

​I tried with glance image-create or nova backup.... but I got the following 

ERROR (BadRequest): The request is invalid. (HTTP 400) (Request-ID: req-89154d7e-f0c5-4a2a-9bc9-b98c0c5e3182)​


​Any clue/info? 
cheers


--
Alfredo