Are you sure you have the correct storage_container_uuid and not the id? 

Do a “/api/nutanix/v2.0/storage_containers/” to get a list with storage containers including their storage_container_uuid

{"detailed_message":"container with specified uuid xxxx-xxxx-xxxx-xxxx does not exist","error_code":{"code":1202,"help_url":"http://my.nutanix.com"},"message":"container with specified uuid xxxx-xxxx-xxxx-xxxx does not exist"}
Response error Message:INTERNAL SERVER ERROR

yes , the specified uuid is correct. got this response message for that api call “/api/nutanix/v2.0/storage_containers/” that used to get a list with storage containers including their storage_container_uuid.

I think the “INTERNAL SERVER ERROR” is the failure. When I query a non existing uuid I get this message: 

{
  "message": "container with specified uuid 7eddde56-9a7e-4ee9-b808-310641408e6 does not exist",
  "detailed_message": "container with specified uuid 7eddde56-9a7e-4ee9-b808-310641408e6 does not exist",
  "error_code": {
    "code": 1202,
    "help_url": "http://my.nutanix.com"
  }
}

I would involve support in this case to get the “Internal Server Error” resolved. 

how can i check uuid of storage container in nutanix client?

the mentioned api call with uuid is working fine till past two weeks.. Suddenly that api is not working and got that error like uuid does not exist. is there any chance uuid of storage container can change? can you please explain how uuid of that storage container got removed even that storage container is active in nutanix client dashboard?