Upload Stemcell failed

[fredga]

Upload stemcell is failed with last release release 2.3.0 og bosh-go-cpi-cloudstack.

CPI trace:

[create_stemcell]  INFO - Uploading stemcell cpitemplate-6e319519-dad7-4dff ...
[create_stemcell] 8 DEBUG - performing template upload to ''
[rpc.JSONDispatcher]  DEBUG - CloudError response bytes 
""Bosh::Clouds::CloudError","message":"[create_stemcell]: error while uploading stemcell: Post \"\": unsupported protocol scheme \"\"","ok_to_retry":false},"log":""